Home
Class 12
CHEMISTRY
The molality of 3M solution os mehtanol ...

The molality of 3M solution os mehtanol if the density of the solution is `0.9g cm^(-3)`, is

A

3.73

B

`3.0`

C

3.33

D

3.1

Text Solution

Verified by Experts

The correct Answer is:
a
`"Volume of the solution="1 L or 1000 cm^(3)`
`"Mass of the solution "=vxxd `
`= (1000cm(3)) xx (0.9 g cm^(3))=900 g`
`"Mass of methanol"(CH_(3)OH)=(3 molxx32 "g mol"^(-1))=96 g`
`"Mass of solvent" =(900-96g)=804 g=0.804 kg `
`"Molality of solution"=("No. of moles of methanol")/("Mass of solvent in kg")`
`(3mol)/(0.804kg)=0.373"mol kg"^(-1)`
=.373 molal
Promotional Banner

Similar Questions

Explore conceptually related problems

M = molarity of the solution m = molality of the solution d = density of the solution (in g. ml^(-1) ) M^(-1)= gram molecular weight of solute Which of the following relations is correct

Density of 3M NaCl solution is 1.28 g/cc. The molality of the solution is

The molarity of NaNO_(3) solution is 1 M. The density of solution is 1.25 g/ml. Calculate molality of solution. (Molar-Mass of NaNO_(3)=85 g ).

Calculate the molality of 1 M concerntrated solution of NaNO_(3) if density of solution= 1.25mL^(-1)

The density of 3M solution of NaCl is 1.25 g mL^(-1) . The molality of the solution is

What is molality of 1 M solution of sodium nitrate if its density is 1.25 "g cm"^(-3) ?