bp_and_fp_problems_nonelectrolytes

bp_and_fp_problems_nonelectrolytes - BOILING POINT...

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BOILING POINT ELEVATION PROBLEMS (nonelectrolytes) Table of K b values for solvents Solvent K b (ºC/molal) Solvent K b (ºC/molal) Water 0.52 Benzene 2.67 Ethanol 1.20 Carbon tetrachloride 5.02 Chloroform 3.85 Acetic Acid 2.93 1. What is the boiling point elevation when 11.4 g of ammonia (NH 3 ) is dissolved in 200 g of H 2 O? 2. How many grams of benzoic acid (C 7 H 6 O 2 ) must be dissolved in 78.1 g of ethanol to raise the boiling point by 4.00ºC? 3. If 67.7 g of urea (CH 4 N 2 O) is dissolved in 833 g of chloroform, what is the elevation in boiling point? 4. How many grams of camphor (C 10 H 16 O) are needed to raise the boiling point of 43.5 g of benzene by 2.10ºC? 5. If 1800 g of ethylene glycol (C 2 H 6 O 2 ) is added to 1900 g of water, what is the elevation in boiling point? 6. If the boiling point of 69.6 g of carbon tetrachloride must be raised by 10.2ºC, how many grams of pyridine (C 5 H 5 N) must be dissolve in the carbon tetrachloride? 7. What is the boiling point elevation when 31.5 g of menthol (C
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bp_and_fp_problems_nonelectrolytes - BOILING POINT...

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