The standard calculation
1 mark · EasyState the first step you should always take when calculating the concentration of a solution using the three-step titration calculation method.
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Calculate the number of moles of the standard (known) solution using its concentration and volume.
Also accept: Find the moles of the solution with known concentration using its volume and concentration.; Work out the moles of the known solution first.
Common mistakes: Stating "calculate the concentration" as the first step.; Stating "convert units first."
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Marking points
B1 · 1 mark · States first step is to calculate moles of the standard (known) solution (by multiplying concentration and volume).
Worked solution
The first step is to calculate the number of moles of the solution with known concentration and volume.