Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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The boiling point of methanol is 72.2 oC. The molar boiling point elevation constat for methanol is 2.7 Co/m. What is the boiling point (in oC) of a solution prepared by dissolving 50 g of acidic acid C2H4O2 in 100 g of methanol? (Tob = 94.7 oC)
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- Ethylene glycol [CH2(OH)CH2(OH)]is a common automobile antifreeze. The freezing point and boiling point of a solution containing 293 g of ethylene glycol and 1085 g of water are ____and _____ respectively. (Kb and Kf for water are 0.52°C/m and 1.86°C/m, respectively) 8.09 to the power of o space end exponent C comma negative 102.3 to the power of o C negative 9.09 to the power of o space end exponent C comma 112.3 to the power of o C negative 6.09 to the power of o space end exponent C comma 108.3 to the power of o C negative 8.09 to the power of o space end exponent C comma 102.3 to the power of o Carrow_forwardThe boiling point of water, H₂O is 100.00 °C at 1 atmosphere and its Kpp value is 0.512 °C/m. A nonvolatile, nonelectrolyte that dissolves in water is sucrose. How many grams of sucrose, C12H22O11 (342.3 g/mol), must be dissolved in 208.0 grams of water to raise the boiling point by 0.350 °C? g sucrose.arrow_forwardNaOH H20 4. 1. Mg°/Et20 2. CO2 5.arrow_forward
- 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.arrow_forward5. A 2.50 g sample of naphthalene, C₁0H8, was dissolved in 100 g of benzene. What is the freezing point of the benzene solution? The freezing point of pure benzene is 5.45°C and its Kf is 5.07°C/m.arrow_forward(Q65) Calculate the vapor pressure (in torr) at 30°C of a solution containing 155.1 grams of the nonelectrolyte glucose (C6H1206) dissolved in 821.4 grams of water. The vapor pressure of pure water at this temperature is 31.80 torr. (4 sf)arrow_forward
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