Which statement about acids and bases is correct?
A chemist reacts dilute nitric acid with insoluble nickel(II) carbonate, NiCO3\text{NiCO}_3NiCO3.
They repeat the experiment two more times. The table shows their results.
| Experiment 1 | Experiment 2 | Experiment 3 | |
|---|---|---|---|
| Mass of nickel(II) nitrate, Ni(NO3)2\text{Ni(NO}_3)_2Ni(NO3)2, produced (g) | 8.34 | 8.47 | 8.31 |
| Mass of nickel(II) carbonate, NiCO3\text{NiCO}_3NiCO3, remaining (g) | 2.12 | 2.05 | 2.16 |
Calculate the mean mass of nickel(II) nitrate, Ni(NO3)2\text{Ni(NO}_3)_2Ni(NO3)2, made. Give your answer to 3 significant figures.
Complete the balanced symbol equation for the reaction. Include state symbols.
2HNO3(aq)+NiCO3(s)→Ni(NO3)2(aq)+…………(…… )+…………(…… ) 2\text{HNO}_3(\text{aq}) + \text{NiCO}_3(\text{s}) \rightarrow \text{Ni(NO}_3)_2(\text{aq}) + \dots\dots\dots\dots (\dots\dots) + \dots\dots\dots\dots (\dots\dots) 2HNO3(aq)+NiCO3(s)→Ni(NO3)2(aq)+…………(……)+…………(……)How does the chemist remove the unreacted solid nickel(II) carbonate, NiCO3(s)\text{NiCO}_3(\text{s})NiCO3(s)?
How does the chemist obtain pure dry nickel(II) nitrate crystals from nickel(II) 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.