An aqueous solution contains 32.7% KCl (weight/weight %) How many grams of water are contained in 100 g of this solution?

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Answer 1 · 2018-04-25T01:21:29

The mass of water in the solution is #"67.3 g"#.

First calculate the mass of #"KCl"# in the solution.

#"%(w/w)"=("mass of solute")/("total mass of solution")xx100%#

#"32.7%(w/w) KCl"=("mass of KCl")/(100"g solution")xx100%#

Divide both sides by #100%#.

#"0.327 KCl"=("mass of KCl")/(100"g solution")#

Multiply both sides by #"100 g"#.

#"32.7 g KCl"##=##"mass of KCl"#

Now calculate the mass of water in the solution.

#"Mass of solution"="mass of solute" + "mass of water"#

#"Mass of water"="mass of solution"-"mass of solute"#

#"Mass of water"="100 g solution"-"32.7 g KCl"="67.3 g"#