alleryA solution with a hydrogen ion concentration of 10 to the minus 7 M has a pH of:
A7
B5
C9
D3
Answer & Solution
Correct answer: A. 7
1. Take the negative logarithm of the concentration.
2. The negative log of 10 to the minus 7 is 7.
3. So the pH is 7.
_Source: syllabus Chemistry, Ch 7 'Equilibrium'_
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