Reversible reactions and equilibrium — Chemistry 0620 IGCSE Question & Worked Solution

(a(i))[1]

State the source from which nitrogen is obtained for the Haber process.

(a(ii))[1]

State the source from which hydrogen is obtained for the Haber process.

(a(iii))[2]

State the usual operating conditions for the Haber process: temperature and pressure.

(a(iv))[1]

Name the substance used as the catalyst in the Haber process.

(a(v))[2]

State the meaning of the term catalyst.

(b(i))[2]

Using reasons that do not refer to cost, explain why a temperature below $900 ^{\circ}C$ is not used and why a pressure above $7\text{ atm}$ is not used.

(b(ii))[1]

Balance the symbol equation for the reaction: ....NO + ....O$_2$ + ....H$_2$O → ....HNO$_3$.

(c(i))[2]

Write the symbol equation for this reaction.

(c(ii))[2]

State two observations that show the copper(II) carbonate is in excess.

(c(iii))[1]

Name one compound, other than copper(II) carbonate, that can be mixed with dilute nitric acid to produce aqueous copper(II) nitrate.

Reversible reactions and equilibrium — practice question

Worked solution & mark scheme