Concentrations of solutions

2 marks · Easy

A solution has a concentration of 0.25 mol/dm³. What volume of this solution (in cm³) contains 0.050 mol of solute? Show your answer to the nearest cm³.

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200 cm³ (±1)

Common mistakes: Not converting volume to cm³; Dividing instead of multiplying

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Marking points

M1 · 1 mark · Uses volume = amount / concentration, calculates volume in dm³.

A1 · 1 mark · Converts dm³ answer to cm³ (answer: 200 cm³).

Worked solution

Volume in dm³ = amount / concentration = 0.050 / 0.25 = 0.20 dm³