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What will be the value of molality for a...

What will be the value of molality for an aqueous solution of 10% w/W NaOH?

A

`2.778`

B

5

C

10

D

`2.5`

Text Solution

Verified by Experts

The correct Answer is:
A
Let mass of solution = 100 g `therefore` Mass of NaOH = 10 g
Mass of solvent = 90 g
`therefore` Molality `=((10)/(40))/((90)/(1000))=(10)/(40)xx(1000)/(90)=2.778`.
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