Solutions
Henry's law; Raoult's law; ideal solutions; colligative properties — lowering of vapour pressure, elevation of boiling point, depression of freezing point, osmotic pressure; van't Hoff factor.
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Take a full mock →Q1 · Solutions · EASY
A solution is prepared by dissolving 6.0 g of urea (Molar mass = 60 g/mol) in 90 g of water. What is the molality (in mol/kg) of the solution?
Q2 · Solutions · MEDIUM
An aqueous solution containing 6.84 g of a non-volatile solute in 250 g of water has a vapor pressure of 23.5 mmHg at 298 K. The vapor pressure of pure water at this temperature is 23.8 mmHg. If the molar mass of the solute is approximately 171 g/mol, which of the following represents the correct relationship for this system?
Q3 · Solutions · HARD
A 0.2 molal aqueous solution of a weak acid (HA) is 25% dissociated. If Kf for water is 1.86 K kg mol⁻¹, the freezing point of the solution (in °C) will be approximately: