Calculating Molality and Mole Fraction for a 10% (by wt) Solution of KNO3

[TypeFun]

Homework Statement

A 10% (by wt) solution of KNO₃ would have what molality and what mole fraction

Homework Equations

mole fraction = moles of KNO₃/total moles
wt % = # g of solute/total g
molality = # moles KNO₃/kg H₂O

The Attempt at a Solution

1 g KNO₃/10 g total
1 g KNO₃/101.1 g/mol = .00989
9 g H2O/18 g/mol = .5 H20

.00989 mol KNO3 / (.00989+.5) = .0194 mole fraction
.00989 moles of KNO3 / .009 kg H20 = 1.1 M

 

[Borek]

Looks OK.