Answer to Question #166872 in General Chemistry for Greg

Question #166872

Calculate the molality of a sucrose solution made by dissolving 67.9 grams sucrose into 94.9 grams water. The molar mass of sucrose is 342.2 g/mol.


1
Expert's answer
2021-02-26T05:59:17-0500

С (molality of sucrose) = n (sucrose)/m (water);

n (sucrose) = m/M = 67.9/342.2 = 0.2 mole;

С (molality of sucrose) = 0.2 mole/94.9 = 0.0021 mole/kg.

Answer: C = 0.0021 mole/kg.


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