The standard calculation
2 marks · EasyA titration uses 20.0 cm³ of 0.175 mol/dm³ nitric acid ( [3m[33mHNO[0m[1;31m[0m[0;32m3[0m ) solution for neutralisation.
Calculate the number of moles of nitric acid used. Show your steps.
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Show answer
0.00350 mol (±0.0001)
Common mistakes: Not converting cm³ to dm³
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Converts 20.0 cm³ to 0.0200 dm³ or sets up calculation correctly.
A1 · 1 mark · Calculates number of moles: 0.0200 × 0.175 = 0.00350 mol (follow-through)
Worked solution
Convert 20.0 cm³ to dm³: 20.0/1000 = 0.0200 dm³
Number of moles = 0.0200 × 0.175 = 0.00350 mol