Question

Question
An unknown substance was tested using red litmus paper and the paper turned blue, which of the following is a probable pH for the substance ?
Responses

1
1

3
3

5
5

7
7

9

Answer 1

If red litmus paper turns blue, it indicates that the substance is basic (alkaline). The pH scale ranges from 0 to 14, where pH values below 7 are acidic, pH 7 is neutral, and pH values above 7 are basic.

Given the responses:

1. pH 1 (acidic)
2. pH 3 (acidic)
3. pH 5 (acidic)
4. pH 7 (neutral)
5. pH 9 (basic)

The only probable pH for the substance that would cause red litmus paper to turn blue is **9**.