The density of 20% (w/w) aqueous NaOH
solution is 1.20 g.mL-1. What is the mole
fraction of water ?(molar mass of NaOH
40g.mol-')
1) 0.95 2) 0.90 3) 0.97 4) 0.94
Answers
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Explanation:
moles of water =
18
900
=50
According to Raoult's law, mole fraction of solvent =
P
solvent
O
P
solvent
=
30
24
=
5
4
=0.8
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