When 2.55 g of an unknown weak acid (HA) with a molar mass
Chapter 15, Problem 148E(choose chapter or problem)
When 2.55 g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of the resulting solution is -0.257 oC. Calculate Ka for the unknown weak acid.
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