Chemistry
Grade-10
Easy
Question
A solution with a pH of 10 is mixed with a solution with a pH of 4. What would the pH of the mixture most likely be?
- 10
- 4
- 40
- 7
Hint:
The pH of solution is average of the two.
The correct answer is: 7
pH 4 = [H+] = 10-4 = [OH-] = 10-10
pH 10 = [H+] = 10-10 = [OH-] = 10-4
They exactly neutralize each other. Therefore, the pH of the mixture most likely be 7.
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