Titration
2 marks · EasyExplain why titration readings should be recorded to two decimal places.
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Also accept: To improve the accuracy and precision of the reading.; Because burette scales allow estimation to the nearest 0.05 cm³ for more reliable results.
Common mistakes: Only for 'neatness' or 'to fill a table'
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Marking points
M1 · 1 mark · Recognises accuracy or precision is improved.
M1 · 1 mark · Mentions burette scale is such that readings can be estimated to the nearest 0.05 cm³ / two decimal places.
Worked solution
Titration readings should be recorded to two decimal places to increase accuracy and because burette scales are marked every 0.1 cm³ and allow estimation between marks, so the second decimal shows if it’s on the line (0) or between (5).