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Which has a greater boiling point elevation and which will have a small freezing point depression?
Question
Which has the greater boiling point elevation: 3 g Ca(NO3)2 in 60 g water or 6 g Ca(NO3)2 in 30 g water?
Which will have a small freezing point depression: 100 g of methanol (CH3OH) in 500 g of water or 200 g of methanol in 250 g of water?
Answer:
Moles Ca(NO3)2 = 3 / 164 g/mol =0.018
molality = 0.018 mol / 0.060 Kg = 0.3
Ca(NO3)2 >> Ca2+ + NO32- => i = 3
delta T = i x kb x m = 3 x 0.512 x...
