An aqueous solution contains 32.7% KCI (weight/weight %).
What is the mole fraction of KCI in
this aqueous solution?
Molar Mass
KCI: 74.55 g/mol
H2O: 18.016 g/mol

The mole fraction of KCl = 0.105

Given

%w/w KCl = 32.7

Required

the mole fraction of KCI

Solution

For 100 g solution : KCl = 32.7 g, H₂O = 67.3 g

mol KCl :

mol H₂O :

total mol of solution = 0.439+3.74=4.179

mol fraction of KCl :

yes

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