What is the pH of a solution prepared by mixing 100. mL of 0.0500 M HCl with 300. mL of 0.500 M HF? [K_a(HF) = 7.1 * 10^-4] A) 1.47 B) 1.90 C) 1.30 D) 1.63 E) 2.82

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Quizplus · Accepted Answer

The pH of the solution can be calculated by considering the dilution of HCl and the weak acid nature of HF. HCl is a strong acid and will dissociate completely, contributing to the H+ concentration directly. HF is a weak acid, and its dissociation will be governed by its acid dissociation constant (Ka). However, given the concentrations and the fact that HCl's contribution to the H+ concentration will be much more significant than HF's due to its complete dissociation and higher initial concentration, the primary factor in determining the pH will be the dilution of HCl. The calculation involves finding the total concentration of H+ ions after mixing and then using the pH formula. The correct answer accounts for these considerations.

What Is the PH of a Solution Prepared by Mixing