Question

assuming complete dissociation of the salt calculate the molality of NaCl solution whose elevation in boiling point is numerically equal to the depression in freezing point of 0.2m aluminium sulphate in water. kb and kf for water is 0.52 and 1.86 kelvin kilogram per mole respectively

Answer 1

Explanation:

Calculating Boiling Point Elevation and Freezing Point Depression. CHEM 30A ... ∆Tb = i Kb m ... Example: What are the BP and FP of a 7.187m NaCl solution? For water: Kb = 0.512 ºC · kg H2O / mol particles. Kf = 1.86 ºC · kg H2O / mol particles ... 7.187 mol NaCl. 1 kg H2O constant (different for each solvent) molality (m) =.