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At 25°C the vapor pressure of pure water is 23.76 mmHg and
Chapter 12, Problem 74P(choose chapter or problem)
At 25°C the vapor pressure of pure water is 23.76 mmHg and that of seawater is 22.98 mmHg. Assuming that seawater contains only NaCl, estimate its molal concentration.
Questions & Answers
QUESTION:
At 25°C the vapor pressure of pure water is 23.76 mmHg and that of seawater is 22.98 mmHg. Assuming that seawater contains only NaCl, estimate its molal concentration.
ANSWER:Step 1 of 2
The vapor pressure of the solvent over a solution is given by the product of the vapor pressure of the pure solvent and the mole fraction of the solvent in the solution is stated by Raoult's law.
where and are the partial pressures over the solution for components and and are the vapor pressures of the pure substances; and and are their mole fractions.