Question:
The pH of a solution is increased from 3 to 6, its H\(^+\) ion concentration will be:
The pH of a solution is increased from 3 to 6, its H\(^+\) ion concentration will be:
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A change of 3 pH units corresponds to a 1000 times change in the H\(^+\) ion concentration.
Updated On: Apr 22, 2026
- Reduced to half
- Doubled
- Reduced by 1000 times
- Increased by 1000 times
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the pH scale.
pH is the negative logarithm of the hydrogen ion concentration: \[ \text{pH} = -\log[H^+] \] A change in pH by 3 units corresponds to a change in the H\(^+\) ion concentration by a factor of 1000.
Step 2: Explanation of the options.
- (1) Reduced to half: Incorrect, as pH change of 3 units changes the concentration by a factor of 1000.
- (2) Doubled: Incorrect, pH change does not double the concentration.
- (3) Reduced by 1000 times: Correct. An increase of 3 pH units corresponds to a 1000 times reduction in H\(^+\) ion concentration.
- (4) Increased by 1000 times: Incorrect, as the concentration decreases by 1000 times.
Step 3: Conclusion.
The correct answer is (3) Reduced by 1000 times.
pH is the negative logarithm of the hydrogen ion concentration: \[ \text{pH} = -\log[H^+] \] A change in pH by 3 units corresponds to a change in the H\(^+\) ion concentration by a factor of 1000.
Step 2: Explanation of the options.
- (1) Reduced to half: Incorrect, as pH change of 3 units changes the concentration by a factor of 1000.
- (2) Doubled: Incorrect, pH change does not double the concentration.
- (3) Reduced by 1000 times: Correct. An increase of 3 pH units corresponds to a 1000 times reduction in H\(^+\) ion concentration.
- (4) Increased by 1000 times: Incorrect, as the concentration decreases by 1000 times.
Step 3: Conclusion.
The correct answer is (3) Reduced by 1000 times.
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