In an experiment to determine the molar mass of an unknown compound I experimentally found a...
In an experiment to determine the molar mass of an unknown compound I experimentally found a molar mass of 68.47 g/mol the actual molar mass is 138.1 g/mol What errors could I have made or why did this happen?
Homework Answers
In the question there is dissociation of solute molecules.
A number of electrolytes dissociate in solution to give two or more particles (ions). Therefore the number of solute particles is more than expected.
So these exhibit higher value of colligative properties.
Since colligative properties are inversely proportional to molecular masses, therefore, molecular masses calculated for such substances as calculated from colligative properties will be less than their normal values.
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