A student heats a sample of purple hydrated cobalt(II) chloride in an open crucible to drive off its water of crystallisation. The mass of the crucible and its contents is recorded at regular intervals.
The results are shown in Table 1.
| Time (minutes) | 0.0 | 2.0 | 4.0 | 6.0 | 8.0 | 10.0 | 12.0 | 14.0 |
|---|---|---|---|---|---|---|---|---|
| Mass of crucible and content (g) | 35.50 | 31.80 | 29.20 | 27.50 | 26.60 | 26.10 | 26.00 | 26.00 |
Explain the trend shown by the data in Table 1.
258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.