molality = moles/kg solvent
Solve for molality.
delta T = i*Kf*m
Solve for delta T and subtract from the normal freezing point.
i is the van't Hoff factor and is the number of dissolved particles. For example, for MgSO4 that will be two since MgSO4 dissociates into Mg^+2 and SO4^=.
What is the freezing point of each solution?
a)1.40mol Na2SO4 in 1750 g H2O
b)0.060 mol MgSO4 in 100g H2O
1 answer
1 answer