15-4prac

# 15-4prac - 15-4 Practice Problems 1 What is the boiling point elevation when 11.4 g of ammonia(NH3 is dissolved in 200g of water Kb for water is

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15-4 Practice Problems 1) What is the boiling point elevation when 11.4 g of ammonia (NH 3 ) is dissolved in 200g of water? K b for water is 0.52 C o /m. 2) How many grams of benzoic acid (C 7 H 6 O 2 ) must be dissolved in 78.1g of ethanol to raise the boiling point by 4.00 C o ? K b for ethanol is 1.2C o /m. 3) If 67.7g of urea (CH 4 N 2 O) is dissolved in 833g of chloroform, what is the elevation in the boiling point? K b for benzene is 2.67 C o /m. 4) How many grams of camphor (C 10 H 16 O) are needed to raise the boiling point of 43.5g of benzene by 2.10 Co? Kb for benzene is 2.67 C o /m. 5) If 1800g of ethylene glycol (C 2 H 6 O) is added to 1900g of water, what is the elevation in the boiling point? K b for water is 0.52 C o /m. 6) If the boiling point of 69.6g of carbon tetrachloride must be raised by 10.2 C o , how many grams of pyridine (C 5 H 5 N) must be dissolved in the carbon tetrachloride? K b for carbon tetrachloride is 5.02 C o /m.

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7. What is the boiling point elevation when 31.5 g of menthol (C 10 H 20 O) is dissolved in 258 g of acetic acid? K
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## This note was uploaded on 12/09/2011 for the course CHEM 1 taught by Professor Staff during the Summer '11 term at Simon Fraser.

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15-4prac - 15-4 Practice Problems 1 What is the boiling point elevation when 11.4 g of ammonia(NH3 is dissolved in 200g of water Kb for water is

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