The meaning of pH

This task is a quick check of your knowledge of the pH scale.

Question

Hine and Peter tested the pH of distilled water. They found it to be neutral.
What was the pH value of the distilled water?

    • 4

    • 5

    • 6

    • 7

    • 8

Question

An industrial chemist tested the pH of a cleaner which contained caustic soda.
The pH, which was 12, can be best described as ...

    • strongly basic

    • mildly basic

    • neutral

    • mildly acidic

    • strongly acidic