Some KCl Is Dissolved in Water 25°C, Where It Completely

question 25

Essay

Some KCl is dissolved in water 25°C, where it completely dissociates. The vapor pressure of pure water at 25°C is 28.3 mmHg. On the graph below, sketch the vapor pressure above the salt solution as a function of the mole fraction of H₂O, assuming that Raoult's law is obeyed. Explain how you arrived at your graph.

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