Homework Answers
Depression in freezing point is directly proportional to molality of the solute in it. So higher the molality , higher is difference in freezing point .which means higher the molality , lower will be the freezing point.
So molality is highest for 0.2 m KF and 0.2 m Ethanol. Now ethanol doesn't dissociate to produce more entities but KF produces K+ and F- in water.
Depression in freezing point also depends on vant Hoff factor, that is the no.of species in solution.
So it is higher for KF. So KF will have the lowest freezing point
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12. Which of the following aqueous solutions would give the lowest freezing point? You must justify...
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Question 30 (1 point) Which of the following aqueous solutions will have the lowest freezing point? a) 0.40 m C2H5OH b) 0.20 m C6H1206 c) 0.10 m CaCl2 d) 0.20 m Naci e) 0.20 m Na2SO4 Question 31 (1 point) The nonvolatile, nonelectrolyte testosterone, C9H2802 (288.4 g/mol), is soluble in ethanol, in 19
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8. Which aqueous solution will have the lowest freezing point? A) 0.60 molal sucrose B) 0.50...
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Which aqueous solution will have the lowest freezing point? (a) 0.050 m CaCl2 (b) 0.15 m...
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Arrange the following solutions in order of increasing freezing point depression. [Hint: The corresponding van’t Hoff...
Arrange the following solutions in order of increasing freezing point depression. [Hint: The corresponding van’t Hoff factor (i) is given]: (a) 0.10 m MgCl2 in water, i = 2.7, Kf = 1.86°C/m for the solvent (water). (b) 0.20 m toluene in diethyl ether, i = 1.00, Kf = 1.79°C/m for the solvent (diethyl ether). (c) 0.20 m ethylene glycol in ethanol, i = 1.00, Kf = 1.99°C/m for the solvent (ethanol).
Match the following aqueous solutions with the appropriate letter from the column on the right. I. 0.14 m Ni(CH3COO)2 A. Lowest freezing point 2. 0.13 m Cr(CHjCOO2 B. Second lowest freezing point 3....
Match the following aqueous solutions with the appropriate letter from the column on the right. I. 0.14 m Ni(CH3COO)2 A. Lowest freezing point 2. 0.13 m Cr(CHjCOO2 B. Second lowest freezing point 3. 0.15 m Ni(CH,COO)2 C. Third lowest freezing point D. Highest freezing point 4. 0.48 m Sucrose(nonelectrolyte) Submit Answer Retry Entire Group 9 more group attempts remaining
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Question 30 (1 point) Which of the following aqueous solutions will have the lowest freezing point? a) 0.40 m C2H5OH b) 0.20 m C6H1206 c) 0.10 m CaCl2 d) 0.20 m Naci e) 0.20 m Na2SO4 Question 31 (1 point) The nonvolatile, nonelectrolyte testosterone, C9H2802 (288.4 g/mol), is soluble in ethanol, in 19
27.Choose the aqueous solution below with the lowest freezing point. These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable. A. 0.075 m NaI B. 0.075 m (NH4)3PO4 C. 0.075 m NaBrO4 D. 0.075 m LiCN E. 0.075 m KNO2
QUESTION 15 Which of the following aqueous solutions will have the LOWEST vapor pressure? , 0.20 m C6H12O6 O 0.20 m NaCl O 0.10 m CaCl2 ○ 0.40 m C2H3OH 0 0.20 in Na2SO4
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Match the following aqueous solutions with the appropriate letter from the column on the right. I. 0.14 m Ni(CH3COO)2 A. Lowest freezing point 2. 0.13 m Cr(CHjCOO2 B. Second lowest freezing point 3. 0.15 m Ni(CH,COO)2 C. Third lowest freezing point D. Highest freezing point 4. 0.48 m Sucrose(nonelectrolyte) Submit Answer Retry Entire Group 9 more group attempts remaining
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