If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?
Correct answer: C. 1000
- A. 10
- B. 100
- C. 1000
- D. 10000
Explanation
Hydrogen-ion concentration is 10^-pH, so changing pH from 5 to 2 changes it from 10^-5 to 10^-2. The ratio is 10^3, or 1000 times.
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