Titration
3 marks · NormalDuring a titration, a student records the following burette readings:
| Initial reading / cm³ | Final reading / cm³ |
|---|---|
| 4.10 | 21.80 |
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Show answer
17.70 cm^3 (±0.05)
Common mistakes: subtracting final from initial
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Uses correct formula: final reading - initial reading.
M2 · 1 mark · Accurate arithmetic subtraction.
A1 · 1 mark · Correct final volume with appropriate unit and number of decimal places: 17.70 cm³.
Worked solution
Volume of solution added = final reading - initial reading = 21.80 cm³ - 4.10 cm³