Question:
What is the pH of a solution with [H\(^+\)] = 10\(^{-3}\) M?
What is the pH of a solution with [H\(^+\)] = 10\(^{-3}\) M?
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pH is the negative base-10 logarithm of the hydrogen ion concentration.
Updated On: Sep 16, 2025
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The Correct Option is A
Solution and Explanation
The pH is calculated as:
\[ \text{pH} = -\log_{10} [\text{H}^+] \] Given \([\text{H}^+] = 10^{-3} \, \text{M}\): \[ \text{pH} = -\log_{10} (10^{-3}) = -(-3) = 3 \] Thus, option (1) is correct.
\[ \text{pH} = -\log_{10} [\text{H}^+] \] Given \([\text{H}^+] = 10^{-3} \, \text{M}\): \[ \text{pH} = -\log_{10} (10^{-3}) = -(-3) = 3 \] Thus, option (1) is correct.
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