📏 THE pH SCALE

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Last updated 8:07 PM on 9/8/26
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12 Terms

1
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What does pH measure?

pH is a measure of the acidity or basicity of a solution.

2
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What range does the pH scale cover?

1 to 14 in your Grade 9 notes.

3
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What pH indicates an acid?

pH < 7

4
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What pH indicates a neutral substance?


pH = 7

5
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What pH indicates a base?

pH > 7

6
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A solution has a pH of 3. Is it acidic, neutral or basic?

Acidic.

7
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A solution has a pH of 7. Is it acidic, neutral or basic?

Neutral.

8
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A solution has a pH of 11. Is it acidic, neutral or basic?

Basic/alkaline.

9
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Which is more acidic: pH 2 or pH 5?


pH 2.

10
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Which is more basic: pH 9 or pH 12?

pH 12.

11
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What is a neutral substance?


A substance that has neither acidic nor basic properties and has a pH of 7.

12
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Give an example of a neutral substance.


Pure water is an example.