CH-73
pH scale
Chemistry · Secondary 3 · Medium · pH scale
A solution of potassium hydroxide has pH 13. After adding water, the pH becomes 11. What happens to the concentration of hydroxide ions, [OH⁻], in the solution?
- It becomes 2 times smaller.
- It becomes 10 times smaller.
- It becomes 20 times smaller.
- It becomes 100 times smaller.
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