題組內容

22. Calcium carbonate reacts with hydrochloric acid.
 CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)

22a. Outline two ways in which the progress of the reaction can be monitored. No practical details are required. [2 marks]65fba0899d97f.jpg