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pH Scale and Indicators

pH Scale and Indicators


Students will determine whether common household substances are acidic, basic, or neutral when given appropriate chemical properties. 

These are your notes. Be sure to stop, pause, or rewind as necessary.

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pH Scale and Indicators Notes

pH Scale and Indicators Notes- ignore the calculating the pH

These are the “S” in WSQ. You must have them under your video notes completed by the due date on the Unit Plan.

1. Define the term "pH"; what does" pH" stand for?

2.  Name the common acid-base indicators used in the laboratory with their color change.

3. What is a universal indicator? What is its advantage?

4. Which is the correct set of acid properties,

 a. sour taste, corrosive, change litmus from red to blue
 b. sour taste, corrosive, change litmus from blue to red
 c. sweet taste, slippery, change litmus from blue to red
 d. sour taste, slippery, change litmus from blue to red

5. Neutral solutions have a pH of:   a. 0                b. 7               c. 14              d. They do not have a pH.

6. Which is true?

 a. pH of less than 7 is basic; pH of more than 7 is acidic
 b. pH of less than 7 is acidic; pH of more than 7 is basic

7. What is a solution that has an excess of H+(hydrogen) ions?

A: pH
B: acid
C: neutral
D: base

8. The pH scale is actually measuring the number of H+ ions in a solution. If there are a lot of H+ ions, the pH is very _______.

A: high
B: low
C: neutral
D: neither

9. ) Describe the pH of                       (a) an acid (b) a base (c) a neutral substance 
10. Which is more acidic?                          (a) grapes or bananas                       (b) baking soda or bleach 
11.  Which is more basic?                          (a) egg or soap                                (b) pumpkin or apple 
12. What is the most acidic substance on the scale? What is the most basic substance on the scale? 
 13. What does pH measure? What does pOH measure? 


Source: various educators and Langhans

HOT Question: pH Scales and Indicators

1. A question that you are still confused about (be specific, include which part of the video, etc)
2. A question that connects the videos together (i.e. asking about the relationship between the content)
3. A question you think you know the answer to, but you want to challenge your classmates with
Use your Unit Plan to help with question starters

Source: inspired by C. Kirch