5. The density of a solution of 3.69 g KCI in 21.70 g H2O is

Question

1.11 g/mL. Calculate the molality of KCI in the solution.

Answer 1

m = molality = mols KCl/kg solution
mols KCl = g/molar mass = 3.69/74.6 = approx 0.05
m = 0.05/0.02170 = ?

Answer 2

The density of a solution of 3.69 g KCI in 21.70 g H₂O is 1.11 g/mL. Calculate the molality of KCI in the solution.