Calculate the freezing point of a solution of 1.95 g of naphthalene (C10H8) in 15.50 g of benzene. The freezing point of pure benzene is 5.5°C. Kf = 5.12°C kg/mol
Calculate the freezing point of a solution of 1.95 g of naphthalene (C10H8) in 15.50 g of benzene. The freezing point of pure benzene is 5.5°C. Kf = 5.12°C kg/mol
Chemistry by OpenStax (2015-05-04)
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ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter11: Solutions And Colloids
Section: Chapter Questions
Problem 62E: What is the freezing point of a solution of dibromobenzene, C6H4Br2, in 0.250 kg of benzene, if the...
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Calculate the freezing point of a solution of 1.95 g of naphthalene (C10H8) in 15.50 g of benzene.
The freezing point of pure benzene is 5.5°C.
Kf = 5.12°C kg/mol
Expert Solution
Step 1
This is a depression of freezing point or lowering of freezing point problem. This lowering of the freezing point depends on the amount or number of solute present in the solution.
The lowering of freezing point(ΔTf) is formulated as
ΔTf = Kf * m
Where Kf is freezing point depression constant
m is the molality of the solution
ΔTf = freezing point of pure substance - freezing point of solution
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