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A solution contains 75.0 g of glucose (molar mass
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Chemistry
- Which of the following will have the lowest total vapor pressure at 25C? a. pure water (vapor pressure = 23.8 torr at 25C) b. a solution of glucose in water with C6H12O6=0.01 c. a solution of sodium chloride in water with NaCl = 0.01 d. a solution of methanol in water with CH3OH=0.2 (Consider the vapor pressure of both methanol [143 torr at 25C] and water.)arrow_forwardCalculate the freezing point and normal boiling points of each of the following aqueous solutions. (a) 2.63 m acetic acid (b) 33.0 % by mass lactose, C12H22O11 (c) 32.15 mL of ethylene glycol, C2H6O2(d=1.113g/mL) in 624 mL of water (d=1.00g/mL)arrow_forwardGlycerin, C3H8O3, is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 164 g glycerin to 338 mL H2O at 39.8C? The vapor pressure of pure water at 39.8C is 54.74 torr and its density is 0.992 g/cm3.arrow_forward
- A sucrose (C12H22O11) solution that is 45.0% sucrose by mass has a density of 1.203 g/mL at 25C. Calculate its (a) molarity. (b) molality. (c) vapor pressure(vpH2Oat25C=23.76mmHg). (d) normal boiling point.arrow_forwardA 13.0% solution of K2CO3 by mass has a density of 1.09 g/cm3. Calculate the molality of the solution.arrow_forwardA sample of HgCI2 weighing 9.41 g is dissolved in 32.75 g of ethanol, C2H5OH ( Kb=1.20 C/m). The boiling point elevation of the solution is 1.27 C. Is HgCI2 an electrolyte in ethanol? Show your calculations.arrow_forward
- Ice Cream A rock salt (NaCl), ice, and water mixture isused to cool milk and cream to make homemade icecream. How many grams of rock salt must be added towater to lower the freezing point by 10.0°C?arrow_forwardConsider the following aqueous solutions: (i) 0.20 m HOCH2CH2OH (nonvolatile, nonelectrolyte); (ii) 0.10 m CaCl2 (iii) 0.12 m KBr; and (iv) 0.12 m Na2SO4. (a) Which solution has the highest boiling point? (b) Which solution has the lowest freezing point? (c) Which solution has the highest water vapor pressure?arrow_forward
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