Chemistry

Chemistry

Problem

A monoprotic weak acid is present at an initial concentration of 0.150 M. The measured pH of the solution at 25 °C is 2.85. What is the acid-dissociation constant, KaK_a, of the acid? a) 9.4×10−69.4\times10^{-6} b) 1.3×10−41.3\times10^{-4} c) 1.3×10−51.3\times10^{-5} d) 9.5×10−39.5\times10^{-3}

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