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Hydrochloric acid (HCl) has 75 meq, and sodium hydroxide (NaOH) has 25 meq. After neutralization, the excess HCl in the mixture is 10 meq. The molarity of [H+] in the solution is calculated to be 1/10, and the pH is determined as -log(1/10). What is the pH of the resulting solution?

1. The pH equals 1.0
2. The pH equals 2.0
3. The pH equals 0.5
4. None of the above

Correct answer: The pH equals 1.0

Solution

The calculation provided in the question is correct. The pH is determined as -log(1/10), which equals 1.0.

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