Solubility curves

1 mark · Easy

State the equation used to calculate the solubility (in g per 100 g of water) from the mass of solute and mass of solvent.

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solubility (g/100 g) = (mass of solute / mass of solvent) × 100

Also accept: solubility = (mass of solute ÷ mass of solvent) × 100; (mass of solute / mass of solvent) x 100

Common mistakes: Omitting ×100; Mixing up numerator and denominator

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Marking points

B1 · 1 mark · States the correct solubility equation as given in the specification and sources

Worked solution

The equation is: solubility (g/100g) = (mass of solute / mass of solvent) × 100.