(a(i))[1]
What colour does litmus paper turn when placed in hydrochloric acid?
(a(ii))[2]
Suggest two methods that could be used to measure the pH of dilute hydrochloric acid.
(a(iii))[1]
Suggest a pH value for dilute hydrochloric acid.
(b(i))[1]
What is observed in both reactions when aqueous sodium carbonate is added separately to dilute ethanoic acid and dilute hydrochloric acid?
(b(ii))[2]
Compare the reaction rates and explain why they differ.
(c(i))[2]
A small piece of magnesium ribbon is put into a test-tube containing dilute hydrochloric acid. A gas is released. Name the gas. Give a test and observation to identify the gas.
(c(ii))[1]
Write the equation for this reaction.