Digital Investigation: Ph Scale And Acid/base Strength Chemistry Worksheet
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2Name:
Hour:
Date:
Digital Investigation: pH Scale and Acid/Base Strength
Answer the questions below based on your current knowledge. Then ask your group about their ideas.
Explain your reasoning for each question.
My response:
a. The most dangerous acids have the highest pH.
Always True Always False Sometimes True
My group’s response:
Always True Always False Sometimes True
b. Soda pop has a similar pH to stomach acid.
My response:
Always True Always False Sometimes True
My group’s response:
Always True Always False Sometimes True
c. Strong bases have a higher pH than weak bases.
My response:
Always True Always False Sometimes True
My group’s response:
Always True Always False Sometimes True
My response:
d. Diluting an acid with water will cause the pH to decrease.
Always True Always False Sometimes True
My group’s response:
Always True Always False Sometimes True
My response:
e. A solution of a weak acid will have a high concentration of H
O
+
3
Always True Always False Sometimes True
My group’s response:
Always True Always False Sometimes True
PART A: PhET Simulation “pH Scale: Basics”
1. Label the above pH scale with “most acidic”, “most basic”, and “neutral”.
2. Using the simulation, identify THREE acids, THREE bases, and one NEUTRAL substance and label
them in their correct location on the pH scale above.
3. What happens to pH when you dilute an acid with water? Give a specific EXAMPLE, including the
amounts you used and the pH before and after.
4. What happens to pH when you dilute a base with water? Give a specific EXAMPLE, including the
amounts you used and the pH before and after.
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