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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

5

B

`2.778`

C

10

D

`2.5`

Text Solution

Verified by Experts

The correct Answer is:
B
`"Moles of "NaOH=(10)/(40)=(1)/(4)=0.25`
`:."Molality "(m)=("Moles of "NaOHxx1000)/("Weight of water (in g)")=(0.25xx1000)/(90)`
`=2.778`
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