A 0.250 g sample of the weak acid HA (molar mass = 150.0 g/mol) is dissolved in 50.0 g of water. The freezing point of the resulting solution is -0.070°C. Calculate the value of Ka for this acid. Assume molality equals molarity in this solution. (Kf for water is 1.86°C/m.)

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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
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Chapter16: Acid-base Equilibria
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Problem 16.153QP: What is the freezing point of 0.92 M aqueous acetic acid? The density of this solution is 1.008...
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A 0.250 g sample of the weak acid HA (molar mass = 150.0 g/mol) is dissolved in 50.0 g of water. The freezing point of the resulting solution is -0.070°C. Calculate the value of Ka for this acid. Assume molality equals molarity in this solution. (Kf for water is 1.86°C/m.)
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