(a)[2]
State what the term equilibrium means.
(b(i))[1]
Explain why the equilibrium position stays the same.
(b(ii))[1]
Suggest why the colour of the gas mixture becomes a deeper purple.
(c)[1]
State what can be inferred about the forward reaction from this information.
(d)[2]
Deduce the oxidation number of iodine, I, in the following: HI I$_2$.
(e(i))[1]
From the list, select the element most likely to be used as the catalyst. Circle the answer you choose. calcium carbon copper sodium sulfur
(e(ii))[1]
State what happens to the position of equilibrium when a catalyst is used.
(e(iii))[1]
State the effect that a catalyst has on a reaction’s activation energy, $E_a$.