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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Definitions:

Blank Indorsement

A type of endorsement on a negotiable instrument where the endorser does not specify an endorsee, making it payable to the bearer.

Restrictive Indorsement

A limit placed on the use of a check or other negotiable instrument which specifies the conditions under which it can be transferred or paid out.

Bearer Paper

A negotiable instrument or security not registered in the owner's name and thus payable to the holder or presenter.

Specially Indorsed

A check or negotiable instrument that has been endorsed (signed on the back) and specifies the person to whom or to whose order the instrument is payable.