This is a redox reaction. State what is meant by the term redox reaction.
Explain how carbon monoxide acts as a reducing agent in this reaction.
Calcium carbonate is added to the blast furnace. Calcium carbonate then undergoes thermal decomposition. $\text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2$ The thermal decomposition of calcium carbonate is endothermic. Complete the reaction pathway diagram in Fig. 2.1 so that it shows: • the reactant and the products • a labelled arrow for the activation energy, $E_a$ • a labelled arrow for the enthalpy change, $\Delta H$.
Describe how slag is made in the blast furnace. Include a symbol equation in your response.
Iron is a transition element. Transition elements form coloured compounds. State two other physical properties that are typical of transition elements and not of Group I metals.
The equation represents the decomposition of iron pentacarbonyl, $\text{Fe(CO)}_5$, in a sealed container. $\text{Fe(CO)}_5(l) \rightleftharpoons \text{Fe}(s) + 5\text{CO}(g)$ Predict and explain how the equilibrium position changes when the pressure is lowered. The temperature stays unchanged.
This reaction can be used to make pure iron. Describe and explain, with reference to the equation, how a sample of pure iron that contains no $\text{Fe(CO)}_5(l)$ is obtained from the equilibrium mixture.
Iron reacts with hot concentrated sulfuric acid. The products are iron(III) sulfate, sulfur dioxide and a liquid that turns anhydrous copper(II) sulfate blue. Construct the symbol equation for this reaction.