Question

Calculate the mole fraction of NaOH in 0.125 M solution

Answer 1

Explanation:

NaOH solution is prepared in water.

Molar mass of NaOH=40 g

Mass of NaOH=10 g

Molar mass of water = 18 g

Given mass of water = 90 g

Number of moles of NaOH=

40

10

=0.25 moles

Number of moles of H

2

O=

18

90

=5 moles

Mole fraction of NaOH=

0.25+5

0.25

=0.047

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