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Part A The Kf value of cyclohexane is fairly large. Discuss the advantages of using solvent...

Part A

The Kf value of cyclohexane is fairly large. Discuss the advantages of using solvent with larger Kf value as opposed to a smaller one when trying to freezing point depression?

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Answer #1

In depression of freezing point of any solvent,Kf is called Molal depression constant or cryoscopic constant.

For depression of freezing points,if the value of Kf is large then the depression of freezing point will be often more corret i.e. the possibilities of error would be less.

So,by the above fact the solvent having more Kf value will affect more.

By the higher values of Kf, observation of larger drops in depression in freezing point becomes easier.

Cyclohexane has higher value (20 °C/m) of Kf hence idea of choosing cyclohexane as solvent will be more appreciable.

Camphor (C10H16O) has more value of Kf than cyclohexane i.e. 80 °C/m.

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