Calculations with equations involving solutions
2 marks · HardCalculate the number of moles of sulfuric acid, H₂SO₄, in 75 cm³ of solution with concentration 0.20 mol/dm³.
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0.015 mol (±0.001)
Also accept: 1.5 × 10^{-2} mol; 1.50 × 10^{-2} mol
Common mistakes: Forgetting to convert cm³ to dm³; Using wrong formula
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Marking points
M1 · 1 mark · Converts 75 cm³ to dm³ (75/1000 = 0.075 dm³).
A1 · 1 mark · Correct calculation: 0.075 × 0.20 = 0.015 mol.
Worked solution
Convert the volume to dm³: 75 cm³ = 0.075 dm³.