A 0.010 M solution of HCl has pH?

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Multiple Choice

A 0.010 M solution of HCl has pH?

Explanation:
Strong acids dissociate completely in water, so the hydrogen-ion concentration equals the acid concentration. Here, [H+] = 0.010 M = 1.0 × 10^-2 M. The pH is pH = -log10([H+]) = -log10(1.0 × 10^-2) = 2.00. So the pH is 2.00. It isn’t 1.00, 3.00, or 4.00 because those would require different [H+] values.

Strong acids dissociate completely in water, so the hydrogen-ion concentration equals the acid concentration. Here, [H+] = 0.010 M = 1.0 × 10^-2 M. The pH is pH = -log10([H+]) = -log10(1.0 × 10^-2) = 2.00. So the pH is 2.00. It isn’t 1.00, 3.00, or 4.00 because those would require different [H+] values.

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