Consider the chemical equation for the reaction of copper metal with concentrated nitric acid:
Cu+4HNO3→Cu(NO3)2+2NO2+2H2O \text{Cu} + 4\text{HNO}_3 \rightarrow \text{Cu(NO}_3\text{)}_2 + 2\text{NO}_2 + 2\text{H}_2\text{O} Cu+4HNO3→Cu(NO3)2+2NO2+2H2OWhich substance acts as the reducing agent in this reaction?
Cu\text{Cu}Cu
HNO3\text{HNO}_3HNO3
Cu(NO3)2\text{Cu(NO}_3\text{)}_2Cu(NO3)2
NO2\text{NO}_2NO2
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.