(a)[1]
Explain why the concentrations of steam and hydrogen stay constant after the dynamic equilibrium mixture has formed.
(b)[2]
The pressure of the equilibrium mixture is raised. The temperature of the closed system is held constant. Predict and explain what, if anything, happens to the composition of the equilibrium mixture.
(c(i))[1]
The equilibrium position shifts to the left-hand side. What conclusion can be drawn about the enthalpy change of the reaction?
(c(ii))[1]
Describe and explain the change in the rate of reaction.
(d(i))[1]
Name compound C produced when dilute sulfuric acid reacts with $\text{Fe}_3\text{O}_4$.
(d(ii))[2]
Construct the chemical equation for this reaction.
(d(iii))[2]
Describe a chemical test used to identify iron(II) ions. State both the reagent and the observation.