Relative molecular masses in solution questions | form five Chemistry

Give the meaning of osmotic pressure of a solution.

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UNSOLVED

Briefly explain in terms of vapour pressure why the freezing point of a solution is lower than that of a pure solvent.

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UNSOLVED

Ammonium chloride solution was dissolved in pure water to make a 25% solution. Calculate the temperature at which this solution freezes. The molar boiling point constant for NH₄Cl  = -1.86^oC kg mol^-1? In your calculations, assume that the addition of the salt does not change the volume of water; show your work clearly including manipulations of units.

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Calculate the molar mass of Y given that a solution of 60g of Y in 1 dm³ of water exerts an osmotic pressure of 4.31x10⁵ Nm^-2 at 25^oC.

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UNSOLVED