Pure benzene, C6H6, freezes at 5.5°C and boils at 80.1°C. What is the boiling point of a solution consisting of cyclohexane (C,H12) dissolved in benzene if the freezing point of this solution is 0.0°C? (For benzene, K

Pure benzene, C6H6, freezes at 5.5°C and boils at 80.1°C. What is the boiling point of a solution consisting of cyclohexane (C,H12) dissolved in benzene if the freezing point of this solution is 0.0°C? (For benzene, K

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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The freezing point of ethanol, CH3CH2OH, is -117.30°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in ethanol is saccharin . A student dissolves 10.10 grams of saccharin, C7H5NO3S (183.2 g/mol), in 266.8 grams of ethanol. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 X Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 X The molality of the solution is ______m.The freezing point of the solution is _____°C. FILL IN THE BLANKS
The freezing point of ethanol, CH,CH,OH, is -117.30°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in ethanol is saccharin . A student dissolves 11.77 grams of saccharin, C,H&NO;S (183.2 g/mol), in 287.1 grams of ethanol. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kp (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH;CH2OH 1.22 1.99 Chloroform CHCI3 3.67 Benzene C,H6 2.53 5.12 Diethyl ether CH;CH2OCH2CH3 2.02 The molality of the solution is m. The freezing point of the solution is °C.
7) A 300.0 mL aqueous solution containing 0.512 g of an unknown polymer has an osmotic pressure of 32.9 torr at 29.5°C. What is the molar mass of the polymer? 29.5°C +273 =303.5K
The freezing point of pure benzene (C6H) is 5.49 °C. The freezing point of a solution made using toluene (C-H³) in benzene is determined to be -13.0 °C. What is the molality of the toluene? (Kf benzene = 5.12 °C/m)
The boiling point of chloroform, CHCl3, is 61.70°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin.A student dissolves 14.17 grams of aspirin, C9H8O4 (180.1 g/mol), in 238.1 grams of chloroform. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution is ____________ m.The boiling point of the solution is _________________°C.
The freezing point of benzene CGH6 is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is DDT. How many grams of DDT, C14H,Cl5 (354.5 g/mol), must be dissolved in 207.0 grams of benzene to reduce the freezing point by 0.400°C ? Refer to the table for the necessary boiling or freezing point constant. Formula | K, (°C/m) Kf(°C/m) Solvent Water H20 0.512 1.86 Ethanol CH;CH,OH 1.22 1.99 Chloroform CHC13 3.67 Benzene CH6 2.53 5.12 Diethyl ether CH;CH,OCH,CH3 2.02 g DDT.
2. When 7. 94 g of xylene was added to 132.5 g of cyclohexane, the freezing point of the solution was -4.9 degrees celsius. What is the molar mass of xylene?
The freezing point of pure benzene (CoHo) is 5.49 °C. The freezing point of a solution made using toluene (C-Hs) in benzene is determined to be -13.0 °C. What is the molality of the toluene? (Kf benzene = 5.12 °C/m)
The solubility of Ne in water at 25 °C is 2.1 × 10⁻⁴ M when the partial pressure of Ne is 0.20 atm. What is the value of the Henry's law constant for Ne?
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If 770 g of ethylene glycol (C2H6O2) is added to 1,000. g of water, what is the freezing point? ° C
What is the molecular formula of the compound (which contains only carbon, hydrogen, and oxygen)?