Which statement about acids and alkalis is correct?
A scientist reacts dilute sulfuric acid with insoluble copper(II) carbonate, CuCO3\text{CuCO}_3CuCO3. They repeat the experiment two more times.
The table below shows their results:
| Experiment 1 | Experiment 2 | Experiment 3 | |
|---|---|---|---|
| Mass of copper(II) sulfate, CuSO4\text{CuSO}_4CuSO4, produced (g) | 5.43 | 5.49 | 5.44 |
| Mass of copper(II) carbonate, CuCO3\text{CuCO}_3CuCO3, remaining (g) | 1.25 | 1.19 | 1.24 |
Calculate the mean mass of copper(II) sulfate, CuSO4\text{CuSO}_4CuSO4, made. Give your answer to 3 significant figures.
Complete the balanced symbol equation for the reaction. Include state symbols.
H2SO4(aq)+CuCO3(s)→CuSO4(aq)+……………(…… )+……………(…… ) \text{H}_2\text{SO}_4(\text{aq}) + \text{CuCO}_3(\text{s}) \rightarrow \text{CuSO}_4(\text{aq}) + \dots\dots\dots\dots\dots (\dots\dots) + \dots\dots\dots\dots\dots (\dots\dots) H2SO4(aq)+CuCO3(s)→CuSO4(aq)+……………(……)+……………(……)How does the scientist remove the unreacted solid copper(II) carbonate, CuCO3(s)\text{CuCO}_3(\text{s})CuCO3(s)?
How does the scientist obtain pure dry copper(II) sulfate crystals from copper(II) sulfate solution?
55 exam-style questions on OCR GCSE Chemistry Types of chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.