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CH302%20quiz%201%20answer%20key%20sp08

CH302%20quiz%201%20answer%20key%20sp08 - CH302 quiz 1...

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CH302 quiz 1 answer key 1. A solution is prepared by dissolving 6.41 g of ordinary sugar (sucrose, C 12 H 22 O 11 , 342 g/mol) in 32.0 g of water. Calculate the boiling point of the solution. (Sucrose is a nonvolatile nonelectrolyte.) K b = 0.512 o C/m a) 100.300 o C b) 101.601 o C c) 99.581 o C d) 100.985 o C Answer key: ( ) ( ) 3 2 2 2 2 6.41 1.0 10 0.586 32.0 342 1.0 0.512 / 0.586 0.300 . . 100.000 0.300 100.300 b b o o o o o g sucrose mol sucrose g H O mol sucrose m g H O g sucrose kg H O kg H O T K m C m m C B P C C C = = = = = = + = 2. A 1.20 g sample of an unknown covalent compound is dissolved in 50.0 g of benzene. The solution freezes at 4.92
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