Question 5/10 What is the vapor pressure of an aqueous solution that has a solute mole fraction of 0.300? The vapor pressure of water is 25.756 mmHg at 25 °C. Choose an answer 2.45 mmHg 6.03 mmHg 1.00 mmHg 18.03 mmHg Question 6/10 The vapor pressure of pure water at 85 °C is 434 torr. What is the vapor pressure at 85 °C of a solution prepared from 100 mL of water (density 1.00 g/mL) and 150 g of diglyme, C6H14O3 , a nonvolatile substance? Choose an answer 390 torr 425 torr 363 torr 361 torr Question 7/10 The vapor pressure of water at 25 °C is 23.8 mmHg. What is the vapor pressure of a solution containing 5.50 g of nonelectrolyte sucrose ( MWsucrose = 342 g/mol) in 12.8 g of water ( MWwater = 18.0 g/mol) at 25 °C? Choose an answer 23.5 mmHg 24.1 mmHg 22.9 mmHg 23.3 mmHg Question 8/10 Fill in the blank. The vapor pressure of a solution containing a nonvolatile solute is directly proportional to the ______________ . Choose an answer molality of the solvent. molarity of the solvent. mole fraction of solute. mole fraction of solvent.
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This is because the more solvent there is, the more molecules there are that can escape into the vapor phase. For the first question, we can use Raoult's law, which states that the vapor pressure of a solution is equal to the mole fraction of the solvent times Show more…
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Problem #1: What is the vapor pressure of an aqueous solution that has a solute mole fraction of 0.1000? The vapor pressure of water is 25.756 mmHg at 25 °C. Problem #2: The vapor pressure of an aqueous solution is found to be 24.90 mmHg at 25 °C. What is the mole fraction of solute in this solution? The vapor pressure of water is 25.756 mmHg at 25 °C.
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