Understanding the pH Scale

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Questions and Answers

What is the pH value of a substance that is considered neutral?

14
5
10
7 (correct)

Which substance listed has the lowest pH value, indicating it is the most acidic?

Blood
Stomach acid (correct)
Ammonia
Pure rainwater

Which of the following substances is likely to have a basic pH?

Pure rainwater
Hand soap (correct)
Battery acid
Stomach acid

What range of pH values represents basic substances?

<p>7 to 14 (A)</p> Signup and view all the answers

Which of the following substances would have a pH value closest to that of blood?

<p>Ammonia (C)</p> Signup and view all the answers

Study Notes

pH Scale

Measures the acidity or basicity of a substance
Stands for "power of hydrogen"
Ranges from 0 to 14
- Values below 7 are acidic
- Values above 7 are basic
- 7 is neutral

Examples of pH Values

Stomach acid: 1.5
Battery acid: Highly acidic
Pure rainwater: 5.6 (Slightly acidic)
Blood: 7.4 (Slightly basic)
Ammonia: Highly basic
Hand soap: Basic
Bleach: Highly basic
Drain cleaner: Highly basic

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Description

Test your knowledge on the pH scale and its significance in measuring acidity and basicity. This quiz covers the range of pH values, examples of substances at different points on the scale, and their implications. Perfect for chemistry students or anyone interested in the science of acids and bases.