A student wants to prepare zinc nitrate solution by reacting solid zinc oxide with dilute nitric acid.
The formulae of the substances involved are shown in the table.
| Substance | Formula |
|---|---|
| zinc oxide | ZnO\text{ZnO}ZnO |
| nitric acid | HNO3\text{HNO}_3HNO3 |
| zinc nitrate | Zn(NO3)2\text{Zn(NO}_3\text{)}_2Zn(NO3)2 |
| water | H2O\text{H}_2\text{O}H2O |
Which equation is balanced?
ZnO+HNO3→Zn(NO3)2+H2O\text{ZnO} + \text{HNO}_3 \rightarrow \text{Zn(NO}_3\text{)}_2 + \text{H}_2\text{O}ZnO+HNO3→Zn(NO3)2+H2O
ZnO+2HNO3→2Zn(NO3)2+H2O\text{ZnO} + 2\text{HNO}_3 \rightarrow 2\text{Zn(NO}_3\text{)}_2 + \text{H}_2\text{O}ZnO+2HNO3→2Zn(NO3)2+H2O
ZnO+2HNO3→Zn(NO3)2+H2O\text{ZnO} + 2\text{HNO}_3 \rightarrow \text{Zn(NO}_3\text{)}_2 + \text{H}_2\text{O}ZnO+2HNO3→Zn(NO3)2+H2O
2ZnO+HNO3→Zn(NO3)2+H2O2\text{ZnO} + \text{HNO}_3 \rightarrow \text{Zn(NO}_3\text{)}_2 + \text{H}_2\text{O}2ZnO+HNO3→Zn(NO3)2+H2O
88 exam-style questions on AQA GCSE Chemistry 4.2 Reactions of acids, covering 4.2.1a Reactions of acids with metals, 4.2.1b Redox in acid-metal reactions, 4.2.2 Neutralisation of acids and salt production, 4.2.3 Soluble salts, 4.2.4 The pH scale and neutralisation, 4.2.5a Titrations, 4.2.5b Calculating quantities in titrations, and 4.2.6 Strong and weak acids. Each one has a worked solution and a mark scheme showing where the marks go.