(a(i))[1]
From the start of the experiment, how much time was needed to collect $30\,\text{cm}^3$ of carbon dioxide?
(a(ii))[2]
At which labelled position on the graph, P, Q, R or S, is the reaction rate greatest? Use the graph to support your response.
(a(iii))[1]
Work out the mass of calcium carbonate required to make $216\,\text{cm}^3$ of carbon dioxide.
(a(iv))[2]
What effect do the following have on the rate of this reaction? Increasing the temperature of the reaction mixture. Keep all other conditions unchanged. Using larger pieces of calcium carbonate. Keep all other conditions unchanged.
(b(i))[2]
Explain why this reaction is classed as thermal decomposition.
(b(ii))[1]
State one further industrial use of calcium carbonate.
(b(iii))[1]
State the kind of chemical reaction that takes place.