1) The vapor pressure of pure water at 120 °C is 1250 torr. A solution of...
1) The vapor pressure of pure water at 120 °C is 1250 torr. A solution of aniline and water has a vapor pressure of 1.2 atm at 120 °C. Assuming that Raoult’s law is obeyed, what is the mole fraction of aniline in the solution? Please show work.
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2) Consider the following solutions, all in 1.0 kg of water: 1 mol of KBr, 1.5 mol CuCl2, 2 mol CH3COOH, and 1.5 mol CoCl3. The correct order for the respective boiling points (P = 1 atm) of the given compound is:
Lowest boiling point →→→→→→→→→ → Highest boiling point
_________ < ___________ < ____________ < __________
Please tell me the reasoning of your answer.
Homework Answers
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1) The vapor pressure of pure water at 120 °C
is 1250 torr. A solution of...
a) The vapor pressure of pure water at 30°C is 31.8 torr. An aqueous solution of...
a) The vapor pressure of pure water at 30°C is 31.8 torr. An aqueous solution of urea had a vapor pressure of 29.3 torrat the same temperature. What is the mole fraction of urea in the solution? b) How many grams of sucrose, C12H22O11(MW=342), must be dissolved in 552 g H2O (MW=18.016) to give a vapor pressure 2.0 torr lower than of pure H2O at 20°C? The VP of H2O at 20°C is 17.5 torr.
A solution containing ethylene glycol and water has a vapor pressure of 4.87 torr at 10°C. Pure water has a vapor p...
A solution containing ethylene glycol and water has a vapor pressure of 4.87 torr at 10°C. Pure water has a vapor pressure of 9.21 torr at 10°C. What is the mole fraction of ethylene glycol in the solution? Be sure to report your answer to the correct number of significant figures.
If at a given temperature, the vapor pressure above pure benzene is 200.0 Torr and above...
If at a given temperature, the vapor pressure above pure benzene is 200.0 Torr and above pure toluene is 40.50 Torr and the mole fraction os toluene is 0.575, what is the partial pressure of each gas above the solution and what is the mole fraction of each gas in the vapor?
The vapor pressure of pure water at 25.0 °C is 23.76 torr. The vapor pressure of...
The vapor pressure of pure water at 25.0 °C is 23.76 torr. The vapor pressure of a solution containing 5.40 g of a nonvolatile substance in 90.0 g of water is 23.32 torr. What is the molecular weight of the solute?
The vapor pressure if ethanol (C2H5OH) is 672 torr at 75°C. The vapor pressure of water...
The vapor pressure if ethanol (C2H5OH) is 672 torr at 75°C. The vapor pressure of water is 289 torr at the same temperature. Calculate the mole fraction of ethonal and water in a solution that is 12% ethanol by volume. Can any one help me step-by-step with this?
4.) Pure water has a vapor pressure of 31.1 torr at 30.1 °C. A solution is...
4.) Pure water has a vapor pressure of 31.1 torr at 30.1 °C. A solution is prepared by adding 90.8 g of unknown substance which is a nonvolatile and non-electrolyte to 375.0 g of water. The vapor pressure of the resulting solution is 29.5 torr. Calculate the molar mass of the unknown substance.
Problem #4: At 29.6 °C, pure water has a vapor pressure of 31.1 torr. A solution...
Problem #4: At 29.6 °C, pure water has a vapor pressure of 31.1 torr. A solution is prepared by adding 86.8 g of "Y", a nonvolatile non- electrolyte to 350. g of water. The vapor pressure of the resulting solution is 28.6 torr. Calculate the molar mass of Y.
Benzene, C6H6, and octane, C8H14, form an ideal solution. At 60°C the vapor pressure of pure...
Benzene, C6H6, and octane, C8H14, form an ideal solution. At 60°C the vapor pressure of pure benzene is 0.507 atm, and the vapor pressure of pure octane is 0.103 atm. A solution is composed of 3.53 g of benzene, and 40.2 g of octane. What is the mole fraction of benzene in the vapor phase above the liquid? In order to receive full credit, your work should clearly show the following: a) the calculation of the partial pressure of benzene...
At 330 K the vapor pressure of pure n-pentane is 1.92 atm and the vapor pressure...
At 330 K the vapor pressure of pure n-pentane is 1.92 atm and the vapor pressure of pure n-octane is 0.07 atm. If 330K is the normal boiling point for a solution of these two substances, what will the mole fractions of each substance be in that solution? [If you can't figure out how to do this mathematically, you can estimate from the plot..... for reduced credit.] Octane+Pentane Pvaps at 330K po Pentane P (atm) Ptot Pv Pent Pv Oct...
The vapor pressure of water at a given temperature is 530 torr. What is the vapor...
The vapor pressure of water at a given temperature is 530 torr. What is the vapor pressure of a solution made by dissolving 4.50 moles of NaCl in 1.00 kg of water? Remember that NaCl is IONIC! Assume that Raoult’s Law is followed. (20 points)
A solution containing ethylene glycol and water has a vapor pressure of 4.87 torr at 10°C. Pure water has a vapor pressure of 9.21 torr at 10°C. What is the mole fraction of ethylene glycol in the solution? Be sure to report your answer to the correct number of significant figures.
4.) Pure water has a vapor pressure of 31.1 torr at 30.1 °C. A solution is prepared by adding 90.8 g of unknown substance which is a nonvolatile and non-electrolyte to 375.0 g of water. The vapor pressure of the resulting solution is 29.5 torr. Calculate the molar mass of the unknown substance.
Problem #4: At 29.6 °C, pure water has a vapor pressure of 31.1 torr. A solution is prepared by adding 86.8 g of "Y", a nonvolatile non- electrolyte to 350. g of water. The vapor pressure of the resulting solution is 28.6 torr. Calculate the molar mass of Y.
At 330 K the vapor pressure of pure n-pentane is 1.92 atm and the vapor pressure of pure n-octane is 0.07 atm. If 330K is the normal boiling point for a solution of these two substances, what will the mole fractions of each substance be in that solution? [If you can't figure out how to do this mathematically, you can estimate from the plot..... for reduced credit.] Octane+Pentane Pvaps at 330K po Pentane P (atm) Ptot Pv Pent Pv Oct...
The vapor pressure of water at a given temperature is 530 torr. What is the vapor pressure of a solution made by dissolving 4.50 moles of NaCl in 1.00 kg of water? Remember that NaCl is IONIC! Assume that Raoult’s Law is followed. (20 points)
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