Which statement about acids and alkalis is correct?
A chemist reacts dilute nitric acid with insoluble zinc carbonate, ZnCO3\text{ZnCO}_3ZnCO3. They repeat the experiment two more times.
The table below shows their results:
| Experiment 1 | Experiment 2 | Experiment 3 | |
|---|---|---|---|
| Mass of zinc nitrate, Zn(NO3)2\text{Zn(NO}_3)_2Zn(NO3)2, produced (g) | 6.34 | 6.27 | 6.31 |
| Mass of zinc carbonate, ZnCO3\text{ZnCO}_3ZnCO3, remaining (g) | 1.45 | 1.52 | 1.48 |
Calculate the mean mass of zinc nitrate, Zn(NO3)2\text{Zn(NO}_3)_2Zn(NO3)2, made. Give your answer to 3 significant figures.
Complete the balanced symbol equation for the reaction. Include state symbols.
2HNO3(aq)+ZnCO3(s)→Zn(NO3)2(aq)+……………(…… )+……………(…… ) 2\text{HNO}_3(\text{aq}) + \text{ZnCO}_3(\text{s}) \rightarrow \text{Zn(NO}_3)_2(\text{aq}) + \dots\dots\dots\dots\dots (\dots\dots) + \dots\dots\dots\dots\dots (\dots\dots) 2HNO3(aq)+ZnCO3(s)→Zn(NO3)2(aq)+……………(……)+……………(……)How does the chemist remove the unreacted solid zinc carbonate, ZnCO3(s)\text{ZnCO}_3(\text{s})ZnCO3(s)?
How does the chemist obtain pure dry zinc nitrate crystals from zinc nitrate 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.