mon. may 12, 2014 (wk 35) agenda: 1 – bell ringer 2 – cn: acids & bases 3 – ph practice...

Mon. May 12, 2014 (Wk 35)

AGENDA:1 – Bell Ringer2 – CN: Acids &

Bases3 – pH Practice

Questions4 – Summary &

Questions

Today’s Goal:Students will be able to compare and contrast acids and bases.Homework1. Complete summary and

questions based on notes.

2. Acids & Bases HW3. Make up last Friday’s

Quiz & last Thursday’s lab by this Thursday!

1. Monday: 4th or 6th pd. Lunch

2. Tue-Thu: 4th or 5th pd. Lunch

3. Wed: During Division4. Thu: At Tutoring

Mon. May 12, 2014 (Wk 35)

Objective: Students will be able to compare and contrast acids and bases.

Bell Ringer:Describe some properties

of an acid. Think of some acids you may have in your home.

5 minutes!

4 MINUTES REMAINING…

Mon. May 12, 2014 (Wk 35)

Objective: Students will be able to compare and contrast acids and bases.

Bell Ringer:Describe some properties

of an acid. Think of some acids you may have in your home.

4 minutes!

3 MINUTES REMAINING…

Mon. May 12, 2014 (Wk 35)

Objective: Students will be able to compare and contrast acids and bases.

Bell Ringer:Describe some properties

of an acid. Think of some acids you may have in your home.

3 minutes!

2 MINUTES REMAINING…

Mon. May 12, 2014 (Wk 35)

Objective: Students will be able to compare and contrast acids and bases.

Bell Ringer:Describe some properties

of an acid. Think of some acids you may have in your home.

2 minutes!

1minute Remaining…

Mon. May 12, 2014 (Wk 35)

Objective: Students will be able to compare and contrast acids and bases.

Bell Ringer:Describe some properties

of an acid. Think of some acids you may have in your home.

1 minute!!!

30 Seconds Remaining…

Mon. May 12, 2014 (Wk 35)

Objective: Students will be able to compare and contrast acids and bases.

Bell Ringer:Describe some properties

of an acid. Think of some acids you may have in your home.

30 seconds!!!

BELL-RINGER TIME IS

UP!

Mon. May 12, 2014 (Wk 35)

AGENDA:1 – Bell Ringer2 – CN: Acids &

Bases3 – pH Practice

Questions4 – Summary &

Questions

Today’s Goal:Students will be able to compare and contrast acids and bases.Homework1. Complete summary and

questions based on notes.

2. Acids & Bases HW3. Make up last Friday’s

Quiz & last Thursday’s lab by this Thursday!

1. Monday: 4th or 6th pd. Lunch

2. Tue-Thu: 4th or 5th pd. Lunch

3. Wed: During Division4. Thu: At Tutoring

Mon. May 12, 2014 (Wk 35)

Objective: Students will be able to compare and contrast acids and bases.

Bell Ringer:Describe some properties

of an acid. Think of some acids you may have in your home.

REVIEW

CHAMPS for May 12, 2014

C – Conversation – No Talking – Take notes

H – Help – RAISE HAND for questionsA – Activity – Cornell Notes: Acids &

BasesM – Materials and Movement –

Pen/Pencil, Chem NotebookP – Participation – Complete your

notesS – Success – Write three questions

and summary about notes.

pH Scale

Topic: Acids and BasesDate: 5/12/14

An ACID is a compound that produces hydronium ions (H3O+) when dissolved in water

Sour taste in foods (lemons) React with metals to produce

hydrogen gas Change blue litmus paper to red Can be very corrosive, destroying

metals and burning skin Think about when we placed Mg metal into

Hydrochloric Acid

What is an Acid?

What are properties of Acids?

Topic: Acids and BasesDate: 5/12/14

When hydrochloric acid (HCl) dissolves in water it ionizes and splits into hydrogen (H+) and chlorine (Cl-) ions.

Hydrogen ions are attracted to the negative oxygen end of water molecule and combine to form hydronium ions

How are hydronium ions formed?

Topic: Acids and BasesDate: 5/12/14

A BASE is a compound that produces hydroxide ions (OH-) when dissolves in water

Bitter taste Slippery feel (like soap) Change red litmus paper to blue Can be very caustic,

destroying metals and burning skin

What is a Base?

What are properties of Bases?

Topic: Acids and BasesDate: 5/12/14

Sodium hydroxide dissociates in water to form sodium (Na+) and hydroxide (OH-)

Ammonia is a base because it accepts a hydrogen atom when dissolves in water, leaving a OH- ion

How are hydroxide ions formed?

Topic: Acids and BasesDate: 5/12/14

The strength and weakness of acids and bases is measured by a PH scale

This scale ranges from 0-14 and describe the acidity of a solution pH stands for “power of hydrogen” pH measures the concentration of

hydronium ions in a solution

How do we measure acids and bases?

Topic: Acids and BasesDate: 5/12/14

7 is neutral (water)Numbers lower than 7 are ACIDIC (0-7)Numbers higher than 7 are Basic (7-14)Mixing Acids and Bases can neutralize them

What do the numbers on a pH scale mean?

ReflectionAcid / Base Strength: The pH Scale

Using the diagram, answer the following:

The lower the pH the more “__________”.

The higher the pH the more “__________”.

PRACTICE PROBLEMS: Label each of the following as either: ACIDIC, BASIC, OR NEUTRAL.

1. Human blood - pH of 7.4. Note: (If pH of Human blood falls below 7.35, can

affect your central nervous system and lead to a coma).

2. Human saliva - Normal results should be between 6.5 and 6.8.

3. Human urine - pH range is 6.0 - 6.5 in the morning and between 6.5 - 7.0 later in the day. (Note: Bacteria usually increase the pH, as they

break down urea in the urine into ammonia).

4. Human milk - pH range is between 7.0 to 7.4.

What do you know about your body?

Which is Acidic and Basic?

Mon. May 12, 2014 (Wk 35)

AGENDA:1 – Bell Ringer2 – CN: Acids &

Bases3 – pH Practice

Questions4 – Summary &

Questions

Today’s Goal:Students will be able to compare and contrast acids and bases.Homework1. Complete summary and

questions based on notes.

2. Acids & Bases HW3. Make up last Friday’s

Quiz & last Thursday’s lab by this Thursday!

1. Monday: 4th or 6th pd. Lunch

2. Tue-Thu: 4th or 5th pd. Lunch

3. Wed: During Division4. Thu: At Tutoring