The Molar Mass of a Solid as Determined by Freezing

question 13

Multiple Choice

The molar mass of a solid as determined by freezing point depression is 10% higher than the true molar mass.Which of the following experimental errors could not account for this discrepancy?

• A)Not all the solid was dissolved.
• B)More than the recorded amount of solvent was pipetted into the solution.
• C)The solid dissociated slightly into two particles when it dissolved.
• D)Some solid was left on the weighing paper.
• E)Before the solution was prepared,the container was rinsed with solvent and not dried.

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