Calculate the vapor pressure at 25 °c of an aqueous solution that is 5.50% nacl by mass. (assume complete dissociation of the solute.) tro, nivaldo j.. chemistry (p. 617). pearson education. kindle edition.

23.38 mmHg is the vapor pressure at 25 °C of an aqueous solution that is 5.50% NaCl by mass.

Explanation:

Vapor pressure of water at 25 °C ,

Vapor pressure of the solution =

Number moles of water in 5.50% NaCl solution.In 100 gram of solution, 94.5 g of water is present.

Number moles of NaCl in 5.50% NaCl solution.5.50 g of NaCl in 100 grams of solution.

Mole fraction of the solute =

The relative lowering in vapor pressure of the solution with non volatile solute is equal to the mole fraction of solute in the solution:

23.38 mmHg is the vapor pressure at 25 °C of an aqueous solution that is 5.50% NaCl by mass.

c is the answer because when something is left after something evaporates that shows the chemical change.

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