grade 7 science chapter 8 and 9.1 some substances...
TRANSCRIPT
![Page 1: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/1.jpg)
Grade 7 Science Unit 3
Some substances dissolve to form solutions faster and more easily than others.
Chapter 8 and 9.1
![Page 2: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/2.jpg)
Review
Solution: A homogeneous mixture ie. they appear as ONE substance
Examples: tap water, vinegar, gold jewelry, etc.
![Page 3: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/3.jpg)
Solutions have 2 parts:
SoluteThe substance that
dissolves (found in less
amounts)Ex: sugar
SolventThe substance in which the solute
dissolves (found in the greatest
amounts)Ex :water
![Page 4: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/4.jpg)
For each of the following situations identify the solute
and the solvent:
![Page 5: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/5.jpg)
Situation Solute Solvent
A.Brass is used to make many objects. Brass is a solution of 35% zinc metal in a 65% copper metal
B.Hydrogen peroxide is used to disinfect cuts. Hydrogen peroxide is a solution of 3% hydrogen and 97% water.
![Page 6: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/6.jpg)
Situation Solute Solvent
A.Brass is used to make many objects. Brass is a solution of 35% zinc metal in a 65% copper metal
Zinc Copper
B.Hydrogen peroxide is used to disinfect cuts. Hydrogen peroxide is a solution of 3% hydrogen and 97% water.
Hydrogen Water
![Page 7: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/7.jpg)
Situation Solute Solvent
C.Dental amalgam is a metal that is used to fill cavities. It is a solution of mercury in tin.
D.Deicing fluid is a cleaner used to clean car and truck windshields. It is made up of a solution of propylene glycol in water.
![Page 8: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/8.jpg)
Situation Solute Solvent
C.Dental amalgam is a metal that is used to fill cavities. It is a solution of mercury in tin.
Mercury Tin
D.Deicing fluid is a cleaner used to clean car and truck windshields. It is made up of a solution of propylene glycol in water.
Propylene glycol Water
![Page 9: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/9.jpg)
Mixing Solutions
Dissolving: To mix completely ie. the solute dissolves into the solvent.
Some substances are able to dissolve better than others.
![Page 10: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/10.jpg)
Ability to Dissolve
Soluble: If something is ABLE to dissolve
Ex: Sugar cube in water
![Page 11: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/11.jpg)
Ability to Dissolve
Insoluble: If something is UNABLE to dissolve
Ex: Plastic in water
![Page 12: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/12.jpg)
Soluble or Insoluble?
![Page 13: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/13.jpg)
Soluble or Insoluble?
![Page 14: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/14.jpg)
How are substances soluble or insoluble?
The Particle Theory of Matter states that:
** “there are attractive forces between the particles”.**
![Page 15: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/15.jpg)
How are substances soluble?
Soluble substances:The particles must be more attracted
to the solvent particles than to themselves.
![Page 16: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/16.jpg)
How are substances insoluble?
Insoluble substances:If the particles of the solute are more
attracted to themselves than to the solvent particles
![Page 17: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/17.jpg)
Solvent or Not?Some materials are good solvents for some solutes but not others.
For example:Oil- Oil is insoluble in water but - Oil is soluble in gasoline.
![Page 18: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/18.jpg)
Can solutes and solvents be in differents states?
Yes! All states of matter:
Solids, Liquids and Gases
![Page 19: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/19.jpg)
States of Solutes and Solvents
Solution Solute State of Solute
Solvent State of Solvent
Soda Water
Carbon Dioxide
Water
![Page 20: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/20.jpg)
States of Solutes and Solvents
Solution Solute State of Solute
Solvent State of Solvent
Soda Water
Carbon Dioxide
Gas Water Liquid
![Page 21: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/21.jpg)
States of Solutes and Solvents
Solution Solute State of Solute
Solvent State of Solvent
Vinegar Acetic Acid
Water
![Page 22: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/22.jpg)
States of Solutes and Solvents
Solution Solute State of Solute
Solvent State of Solvent
Vinegar Acetic Acid
Liquid Water Liquid
![Page 23: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/23.jpg)
States of Solutes and Solvents
Solution Solute State of Solute
Solvent State of Solvent
Salt water
Salt Water
![Page 24: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/24.jpg)
States of Solutes and Solvents
Solution Solute State of Solute
Solvent State of Solvent
Salt water
Salt Solid Water Liquid
![Page 25: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/25.jpg)
States of Solutes and Solvents
**Alloy: Solutions made from two or more metals.
Solution Solute State of Solute
Solvent State of Solvent
Brass Zinc Copper
![Page 26: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/26.jpg)
States of Solutes and Solvents
**Alloy: Solutions made from two or more metals.
Solution Solute State of Solute
Solvent State of Solvent
Brass Zinc Solid Copper Solid
![Page 27: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/27.jpg)
Homework
Complete Homework Questions!
![Page 28: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/28.jpg)
Concentrations of Solutions
Concentration: The quantity of solute that is dissolved in a certain quantity of the solvent.
Can be described qualitatively or quantitatively.
![Page 29: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/29.jpg)
Concentration can be described two ways:
Qualitative*Quality
Using words Like “dilute” or “concentrated”
Quantitative*Quantity
Using numbers. This is especially important when
safety is an issue!
![Page 30: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/30.jpg)
Student Practice... (page 471)
Qualitative or Quantitative? #1(a).Food coloring made the water blue.
(b).Adding 3 mL of food coloring turned 250 mL of water blue.
![Page 31: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/31.jpg)
Student Practice... (page 471)
Qualitative or Quantitative? #1(a).Food coloring made the water blue.
Qualitative
(b).Adding 3 mL of food coloring turned 250 mL of water blue.
Quantitative
![Page 32: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/32.jpg)
#2(a).The water became warmer.
(b).The water’s temperature increased by 5 degree Celsius.
![Page 33: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/33.jpg)
#2(a).The water became warmer.
Qualitative(b).The water’s temperature increased
by 5 degree Celsius.Quantitative
![Page 34: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/34.jpg)
#3(a).We needed just over a dozen floor tiles for our model room.
(b).We needed 14 floor tiles for our model room.
![Page 35: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/35.jpg)
#3(a).We needed just over a dozen floor tiles for our model room.
Qualitative(b).We needed 14 floor tiles for our
model room.Quantitative
![Page 36: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/36.jpg)
#4(a).The liquid boiled in 5 min.
(b).The liquid took only a few minutes to boil.
![Page 37: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/37.jpg)
#4(a).The liquid boiled in 5 min.
Quantitative(b).The liquid took only a few minutes
to boil.Qualitative
![Page 38: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/38.jpg)
#5(a).The mass of this solid is 5g more than
that one.
(b).This solid is heavier than that one.
![Page 39: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/39.jpg)
#5(a).The mass of this solid is 5g more than
that one.Quantitative
(b).This solid is heavier than that one.Qualitative
![Page 40: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/40.jpg)
#6(a).He drinks eight glasses of water each
day.
(b).He drinks 2L of water each day.
![Page 41: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/41.jpg)
#6(a).He drinks eight glasses of water each
day.Qualitative
(b).He drinks 2L of water each day.Quantitative
![Page 42: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/42.jpg)
Dilute vs. Concentrated
Dilute:A small amount of dissolved solute in
the solvent.Concentrated:There is a large amount of dissolved
solute in a solvent
![Page 43: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/43.jpg)
![Page 44: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/44.jpg)
Mini - Activity
The two cups below each had hot water with a tea bag sitting in them.
The time below the cup indicates how long the tea bag has been in the cup.
![Page 45: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/45.jpg)
Directions:1.Supposing these were clear cups, use
a brown lead to color how dark you think the tea would be in each cup.
2.Write: dilute solution or concentrated solution under the cup you think it describes.
![Page 46: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/46.jpg)
Think about it!
If we keep adding solute, eventually it will stop dissolving…
Think: if you keep adding salt, eventually there will be too much to dissolve
What do we call this?
![Page 47: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/47.jpg)
Saturated vs. Unsaturated
Saturated: Is when no more solute will dissolve at a certain temperature
Draw in the beakers below what happens when a solution is saturated:
![Page 48: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/48.jpg)
Saturated vs. Unsaturated
Saturated: Is when no more solute will dissolve at a certain temperature
Draw in the beakers below what happens when a solution is saturated:
![Page 49: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/49.jpg)
Saturated vs. Unsaturated
Unsaturated: Is when solute is able to dissolve at a certain temperature
Draw in the beakers below what happens when a solution is unsaturated:
![Page 50: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/50.jpg)
Saturated vs. Unsaturated
Unsaturated: Is when solute is able to dissolve at a certain temperature
Draw in the beakers below what happens when a solution is saturated:
![Page 51: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/51.jpg)
![Page 52: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/52.jpg)
Question to ponder...Can a solution that is concentrated be
called unsaturated? Explain
![Page 53: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/53.jpg)
Factors affecting solubility
![Page 54: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/54.jpg)
Factors affecting the Rate of dissolving
Factors that affect the rate of dissolving include:
1. Surface area of the solute2. Temperature3. Pressure
![Page 55: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/55.jpg)
Surface area of solute
The smaller the solute particles, the quicker they will dissolve
![Page 56: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/56.jpg)
Temperature
The higher the temperature, the more solute and the faster the solute will dissolve
![Page 57: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/57.jpg)
Temperature and solubilityAs temperature increases, the solubility
of a solid increases
BUT
As temperature increases, the solubility of a gas decreases.
![Page 58: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/58.jpg)
Pressure
Gases are more soluble in liquids under higher pressure
Opened bottle decreases pressure and “bubbles” come out of solution
![Page 59: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/59.jpg)
Pressure
As pressure increases, the solubility of a gas increases.
![Page 60: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/60.jpg)
Homework
Complete Homework Questions!
![Page 61: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/61.jpg)
Lab
Lab activity!!
![Page 62: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/62.jpg)
Section 9.1 - Last section!
Separating Solutions
![Page 63: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/63.jpg)
Partner activityhow you would separate the following mixtures...
- Salt water - Muddy water - Nuts and bolts - Iron filings and sand - Vegetable oil and sand - Vegetable oil and water - Salt and pepper
![Page 64: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/64.jpg)
DISCUSSION QUESTION
“Are the components you have separated still mixtures, or are they
pure? Why or why not?”
![Page 65: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/65.jpg)
SEPARATION TECHNIQUES
1.Mechanical Sorting:
Used to separate the parts of a mixture, often based particle size.
Examples: floatation & magnetism
![Page 66: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/66.jpg)
Flotation
![Page 67: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/67.jpg)
Magnetism
![Page 68: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/68.jpg)
2. FILTRATION:
A common way to separate solid particles from a mixture
The filters can have holes of varying sizes...small to microscopic.
![Page 69: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/69.jpg)
![Page 70: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/70.jpg)
EVAPORATION:
Uses a change of state from a liquid to a gas.
**The solute and solvent have different boiling points
![Page 71: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/71.jpg)
Evaporation
![Page 72: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/72.jpg)
PAPER CHROMATOGRAPHY:
Used to separate the colored substances in a mixture such as ink.
Used to separate the solvents in a mixture.
![Page 73: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/73.jpg)
![Page 74: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/74.jpg)
DISTILLATION:
Uses two changes of state: - evaporation - condensation
It allows you to recover BOTH the solute and solvent from a solution.
![Page 75: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/75.jpg)
bbc
![Page 76: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/76.jpg)
Distillation
![Page 77: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/77.jpg)
SEPARATION TECHNIQUESIN THE HOME:
- Colanders
- Clothes dryers
- Window screens
- Coffee percolators
- Salad spinners
Any others?
![Page 78: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/78.jpg)
Activity!
Demonstration and mini activities!
Magnetism, filtration, paper chromatography and Distillation!
![Page 79: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/79.jpg)
Practice Questions
Unit Review Practice Questions
![Page 80: Grade 7 Science Chapter 8 and 9.1 Some substances …lushmanscience.weebly.com/uploads/2/3/5/3/23534300/grade_7_scien… · Grade 7 Science Unit 3 Some substances dissolve to form](https://reader031.vdocuments.mx/reader031/viewer/2022030411/5a9de02e7f8b9aee528d8e5f/html5/thumbnails/80.jpg)
Chapter 8 & 9.1 Assignment
Due next class!