If your unknow solid has an impurity that is insoluble in cyclohexane, will this impurity result in the molar mass of the unknow

Question

timofeeve [1]

3 years ago

14

If your unknow solid has an impurity that is insoluble in cyclohexane, will this impurity result in the molar mass of the unknow

n solid being recorded as high, low, or unaffected? Explain.

Chemistry

1 answer:

ser-zykov [4K] · Answer 1 · 2022-08-17T14:55:28+03:00

Answer:

High

Explanation:

When the unknown compound contains an impurity that is insoluble in cyclohexane, the solute will not dissolve in the solvent (cyclohexane) completely. ∆T of the solution would be smaller than it is supposed to be, when compared to a compound without such insoluble impurity. Molecular weight determination won't be accurate because the molecular weight obtained will be higher as a result of the fact that the mass of the solute would include the actual solute that is changing the temperature and the excess mass of the impurity.