1 21 what acids & bases part ii
TRANSCRIPT
![Page 1: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/1.jpg)
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
90%
![Page 2: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/2.jpg)
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
82%
![Page 3: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/3.jpg)
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
80%
![Page 4: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/4.jpg)
Launch: 1/19 Grab your binder and immediately take a seat!
Place launch paper on your desk.
Friday’s Quiz Data:
Today’s Objective: I can describe the properties of acids and bases.
87%
![Page 5: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/5.jpg)
Announcements The semester ends tomorrow
Missing work is due today
Quiz tomorrow!
Lab due tomorrow!
Unit #6 exam moved to Thursday 1/28
![Page 6: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/6.jpg)
January Calendar
![Page 7: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/7.jpg)
What are acids & bases? – Part II
Mr. Heffner 1/21/10
![Page 8: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/8.jpg)
Review: What are acids and bases? Solutions can be classified as…
Acids pH < 7 taste sour
Ex: lemon juice burn skin turn litmus paper red
Bases pH > 7 taste bitter
Ex: soap feel slippery turn litmus paper blue
“pH scale”
![Page 9: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/9.jpg)
What are acids and bases? The Brønsted-Lowry definition:
Acids donate hydrogen ions Bases accept hydrogen ions
Hydrogen ions are positively-charged hydrogen atoms
Symbol =
charged atoms
H+
![Page 10: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/10.jpg)
Example 1. In the following reaction, identify the acid and the
base.
HF loses (donates) = acid
H2O gains (accepts) = base
HF + H2O F- + H3O+ loses an
H+ forms gains an
H+ forms
![Page 11: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/11.jpg)
Example 2. In the following reaction, identify the acid and the
base.
HSO4- gains (accepts) = base
H2O loses (donates) = acid
HSO4- + H2O H2SO4
- + OH-
gains an H+
forms loses an H+
forms
![Page 12: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/12.jpg)
Example 3. In the following reaction, identify the acid and the
base.
HCl loses (donates) = acid
H2O gains (accepts) = base
HCl + H2O Cl- + H3O+ loses an
H+ forms gains an
H+ forms
![Page 13: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/13.jpg)
Example 4. In the following reaction, identify the acid and the
base.
H3PO4 loses (donates) = acid
H2O gains (accetps) = acid
H3PO4 + H2O H2PO4- + H3O+
loses an H+
forms gains an H+
forms
![Page 14: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/14.jpg)
Whiteboards Work in pairs
Trade-off marker every question
Partner without the marker should be checking work at each step!
You have 60 seconds to solve the question Show all of your work! Don’t forget units!
Lift board only when prompted
![Page 15: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/15.jpg)
H2O + HF H3O+ + F-
In the above equation, which reactant molecule is the acid?
![Page 16: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/16.jpg)
HI + H2O H3O+ + I-
In the above equation, which reactant molecule is the base?
![Page 17: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/17.jpg)
HSO4- + H2O H2SO4 + OH-
In the above equation, which reactant molecule is the base?
![Page 18: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/18.jpg)
H2PO4- + H2O HPO4
2- + H3O+ In the above equation, which reactant
molecule is the acid?
![Page 19: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/19.jpg)
H2O + NaHCO3- NaCO3
2- + H3O+ In the above equation, which reactant
molecule is the acid?
![Page 20: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/20.jpg)
OH- + HSO4- SO4
2- + H2O In the above equation, which reactant
molecule is the base?
![Page 21: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/21.jpg)
Practice Questions Practice question worksheet
![Page 22: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/22.jpg)
Exit Slip 1. Which of the following are properties of acids?
a. they taste bitter and turn litmus paper blue b. they have a pH of less than 7 and turn litmus paper red
c. they have a pH of greater than 7 and taste sour d. they usually feel slippery like soap
![Page 23: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/23.jpg)
Exit Slip 2. The Bronsted-Lowry definition of a base is
a. a molecule that loses an electron b. a molecule that has a pH of greater than 7
c. a molecule that donates hydrogen ions d. a molecule that accepts hydrogen ions
![Page 24: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/24.jpg)
Exit Slip 3. In the equation, H2O + HI H3O+ + I-, which
reactant molecule acts as the acid? a. H2O b. HI c. H3O+
d. I-
![Page 25: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/25.jpg)
Exit Slip 4. In the equation, H2PO4
- + H2O H3PO4 + OH-, which reactant molecule acts as the base?
a. H3PO4 b. OH- c. H2PO4
-
d. H2O
![Page 26: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/26.jpg)
Exit Slip 5. Why could SO4
2- not act as a Bronsted-Lowry acid? a. because it can donate O2- ions to solution b. because it has no H+ ions to donate to solution
c. because it cannot accept and H+ ions d. pH 2
![Page 27: 1 21 What Acids & Bases Part Ii](https://reader034.vdocuments.mx/reader034/viewer/2022042816/558e56281a28ab53508b465e/html5/thumbnails/27.jpg)
Homework Finish practice questions