State the two pieces of apparatus needed to make the measurements shown on the graph.
On the axes below, sketch a graph to show how the rate of reaction changes as the reaction goes on. Take the initial rate of reaction to be the point at X.
Calculate the mass, in grams, of barium carbonate used. $\text{BaCO}_3 + 2\text{HCl} \rightarrow \text{BaCl}_2 + \text{H}_2\text{O} + \text{CO}_2$
On the grid, draw the graph you would expect if the same mass of barium carbonate were added as large lumps rather than as a powder. All other conditions stay the same as in the original experiment. Explain why your graph differs from the original graph.
On the grid, draw the graph expected if the concentration of dilute hydrochloric acid is changed from 0.1 mol/dm$^3$ to 0.2 mol/dm$^3$. All other conditions stay the same as in the original experiment. Explain, in terms of particles, why your graph differs from the original graph.
Deduce the volume of gas formed at room temperature and pressure, in cm$^3$, in this experiment.