A student performs a titration five times to determine the volume of standard sodium carbonate solution required to neutralise a sample of hydrochloric acid. Their burette readings are recorded in the table below.
| Rough | Titration 1 | Titration 2 | Titration 3 | Titration 4 | |
|---|---|---|---|---|---|
| Final reading (cm3\text{cm}^3cm3) | 25.90 | 24.85 | 48.95 | 24.60 | 49.30 |
| Initial reading (cm3\text{cm}^3cm3) | 0.80 | 0.60 | 25.10 | 0.30 | 25.10 |
What is the mean volume of sodium carbonate solution that the student should use for subsequent concentration calculations?
24.15 cm324.15\text{ cm}^324.15 cm3
24.25 cm324.25\text{ cm}^324.25 cm3
24.34 cm324.34\text{ cm}^324.34 cm3
24.28 cm324.28\text{ cm}^324.28 cm3
Practise Edexcel GCSE Chemistry Quantitative analysis with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.