(a(i))[2]
State what the term electrolysis means.
(a(ii))[1]
Explain the reason inert electrodes are used.
(a(iii))[2]
Give the products formed at each electrode. negative electrode positive electrode
(a(iv))[2]
Write the ionic half-equation for what happens at the negative electrode.
(b(i))[1]
Write the equation for stage 1.
(b(ii))[2]
Explain the meaning of the term equilibrium.
(b(iii))[2]
Explain what the diagram indicates about the energy changes in the forward reaction.
(c)[1]
State the substance that oleum reacts with in stage 4.
(d)[2]
Calculate the concentration of sulfuric acid in $\text{g dm}^{-3}$.