Pre-AP Chemistry 3.31.09

New Seating Charts

Go over Ch 19 Tests

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Acid / Base In-class Activity in groups

Discuss analysis questions

Homework

Let’s see what you already know about

acids and bases?

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What do you already know about acids and bases?

1. If a solution has a pH of 4, the solution is…?

a.Acidicb.Basicc.neutral

2. Pure water has a pH of…?

a. 7b. 5c. 10

3. What is the pH of your stomach acid?

a. 7-9b. 3-4c. 1-2

4. Which acid is in your stomach?

a. HCl

b. H2SO4

c. HNO3

5. What acid is in Coke?

a. Hydrochloric acid

b. Phosphoric acid

c. Acetic acid

6. True / False

Acids are more harmful than bases.

a. True

b. False

7. In the movie “Fight Club”, what substances was used to ease the pain of Edward Norton's hand when lye was placed on it?

a. Vinegar

b. Water

c. Battery acid

8. Which acid is battery acid?

a. Nitric acidb. Hydrochloric acidc. Sulfuric acid

9. Most household cleaners are…?

a. Acidic

b. Basic

c. Neutral

10.What acid is found in fruits?

a. Citric acid

b. Acetic acid

c. Boric acid

Data and Analysis1.Use your observations to group the test solutions

into as many categories as are needed to account for similarities and differences in chemical reactivity. Be prepared to justify your classification scheme.

2.What strategy could you use to identify an unknown substance as an acid or a base.

3.A drop of bromthymol blue placed in an unknown solution turns yellow. Is this solution acidic or basic?

4.Why do you think universal indicator is called an indicator?

5.What ionic species is common among the group of compounds you categorized as acids? As bases?

Homework:

Read and take notes over Section 20.1 and 20.2

Naming Acids Wkst

Set up lab notebook

Moodle Reading Quizzes Section 20.1 (includes in-class activity) Due by Wed 12:15pm

Section 20.2 Due by Friday 3pm