Name the catalyst that is used in the Haber process.
Explain how a catalyst increases the rate of reaction.
Ammonium phosphate, $(\text{NH}_4)_3\text{PO}_4$, is used as a fertiliser. Calculate the percentage by mass of nitrogen in ammonium phosphate. Give your answer to three significant figures.
State the name of a compound used to reduce the acidity of soil.
Explain how this compound reduces the acidity of soil.
Ammonia is produced when nitrogen(I) oxide, $\text{N}_2\text{O}$, is reduced by hydrogen. The reaction is exothermic. $\text{N}_2\text{O} + 4\text{H}_2 \rightarrow 2\text{NH}_3 + \text{H}_2\text{O}$ Complete and label the energy profile diagram for this reaction so that it includes: • the reactants and products • the enthalpy change of the reaction.
Copper(II) oxide, $\text{CuO}$, reacts with ammonia. The products are copper, nitrogen and a liquid which turns blue cobalt(II) chloride paper pink. Construct the equation for this reaction.