(a)[1]
Explain why the volume of hydrogen gas stays the same after six minutes.
(b)[1]
What volume of hydrogen gas was given off in the first two minutes of the reaction?
(c)[2]
On the grid, sketch the graph for the experiment carried out using $0.1\,\text{mol dm}^{-3}$ hydrochloric acid.
(d)[1]
Give the name of the salt produced when zinc reacts with hydrochloric acid.
(e)[1]
Which one of the following pH values could represent the pH of dilute hydrochloric acid? Circle the correct answer. pH 1 pH 7 pH 9 pH 13