The hydrogen ion concentration of a solution is 9.37 × 10^-5 M. What is the pH?

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Multiple Choice

The hydrogen ion concentration of a solution is 9.37 × 10^-5 M. What is the pH?

Explanation:
pH is the negative base-10 logarithm of the hydrogen-ion concentration: pH = -log10[H+]. For [H+] = 9.37 × 10^-5 M, log10[H+] = log10(9.37) + log10(10^-5) = log10(9.37) - 5 ≈ 0.97 - 5 = -4.03. Taking the negative gives pH ≈ 4.03. So the pH is about 4.03. The given concentration is not the pH value itself, and the other options (around 8 or 9) would correspond to much higher pH, not this acidic concentration.

pH is the negative base-10 logarithm of the hydrogen-ion concentration: pH = -log10[H+]. For [H+] = 9.37 × 10^-5 M, log10[H+] = log10(9.37) + log10(10^-5) = log10(9.37) - 5 ≈ 0.97 - 5 = -4.03. Taking the negative gives pH ≈ 4.03.

So the pH is about 4.03. The given concentration is not the pH value itself, and the other options (around 8 or 9) would correspond to much higher pH, not this acidic concentration.

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