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At 25 °C the saturated vapour pressure of water is 24 mm Hg. Find the saturated vapour pressure of a 5% aqueous solution of urea at the same temperature. (Molar mass of urea = 60 g mol⁻¹)
(a) Calculate the mass of a non-volatile solute (molar mass 40g mol⁻¹) which should be dissolved in 114 g octane to reduce its vapour pressure to 80%. (b) What are Azeotropes? Give one example each of minimum boiling and maximum boiling azeotropes.
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