(a(i))[1]
Hydrochloric acid with a concentration of 1.2 mol/dm^{3} is used, while every other condition stays unchanged.
(a(ii))[1]
A piece of iron with a mass of 1 g is used, with every other condition kept unchanged.
(a(iii))[1]
The experiment is carried out at \(25 ^{\circ}\text{C}\), with every other condition unchanged.
(b(i))[1]
State the name of another iron ore.
(b(ii))[3]
Describe a method to show that siderite contains a carbonate.
(c)[2]
Use this information to order the metals by reactivity, with the least reactive metal first.