Calculations with equations involving solutions
2 marks · NormalCalculate the number of moles of copper(II) sulfate in 200 cm³ of solution with concentration 0.050 mol/dm³.
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0.010 mol (±0.0005)
Also accept: 1.0 × 10^{-2} mol; 0.01 mol
Common mistakes: Not converting cm³ to dm³
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Marking points
M1 · 1 mark · Converts 200 cm³ to 0.200 dm³ or uses the correct formula.
A1 · 1 mark · Correct calculation: 0.01 mol. (follow-through)
Worked solution
Convert 200 cm³ to dm³: 200 ÷ 1000 = 0.2 dm³.