Question

If the molality of methanol in an aqueous solution is 6
then the mass percentage of methanol in the solution
will be
24.2%
16.1%
8.4%
31.5%​

Answer 1

Answer:

it your answer.

31.5%.

Answer 2

Given - Molality of methanol in aqueous solution - 6

Find - Mass percentage of methanol in solution.

Solution - Molality is calculated by the formula - number of moles per unit mass of solvent in kilogram.

As per the formula, 6 moles of methanol are present in 1000 gram of water.

Mass percent is calculated by the formula -

mass of methanol / total mass *100

Mass of methanol - number of moles*molecular weight

Mass of methanol - 6*32 - 192 gram

Keeping the values in equation-

Mass percent - (192/1192)*100

Mass percent - 16.1%

Thus, option b) 16.1% is the correct answer.