Acids And Bases Lab Activity printable pdf download

Acids And Bases Lab Activity

Name __________________________________________ Date ___________ Period ______

Acids and bases lab activity

Objectives: Students will be able to…

Compare and contrast the hydrogen ion concentration for various acid and base solutions

Determine what happens when vinegar and baking soda are mixed

Use pH indicators to determine the acidity of a solution

Test various substances to determine if they are acidic or basic

Essential Questions

1. What is the pH scale?

2. How are acids and bases measured by a pH indicator?

3. How are acids and bases different?

4. What types of substances are considered acids and bases?

Materials:

• Copies of Acid/base lab sheets

• Test wells

• pH litmus paper

• copies of reading “History of the pH scale”

• copy of Acid/Base lab

• variety of solutions (lemon juice, vinegar, water, tea, milk, soap, baking soda)

• goggles

Safety Precautions

• Students must wear goggles!

• Do not taste or directly inhale any of the solutions.

Procedure

1. With a partner, choose 5 different substances to test.

2. With your partner, hypothesize whether each substance is an acid or a base. Record on the table

below.

3. Put each substance in a test well. If it is a liquid, test the liquid directly. If it is a solid, it needs to be

mixed with water so the pH can be determined.

4. Dip a pH strip into each of the 5 substances and allow it to sit for 10-20 seconds. Using the pH scale on

the pH strip container, measure the pH level and record it on the chart.

Acids And Bases Lab Activity