Concentrations of solutions

2 marks · Hard

A solution contains 0.036 mol of sodium sulfate (Na₂SO₄) in 0.300 dm³ of solution. Calculate the concentration of sodium sulfate in mol/dm³. Show your answer to 2 decimal places.

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0.12 mol/dm³ (±0.01)

Also accept: 0.120 mol/dm³

Common mistakes: Dividing 0.300 by 0.036; Not rounding to two decimal places

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Marking points

M1 · 1 mark · Uses the formula concentration = amount / volume (in dm³).

A1 · 1 mark · Arrives at 0.12 mol/dm³ to two decimal places. (follow-through)

Worked solution