(a)[1]
Deduce how long the reaction takes to finish.
(b)[2]
The experiment is carried out again using dilute hydrochloric acid at a lower concentration. Draw a line on the grid to show how the volume of hydrogen varies with time when dilute hydrochloric acid of a lower concentration is used. All other conditions remain unchanged.
(c)[2]
Describe the effect each of the following has on the rate of reaction of magnesium with hydrochloric acid. • The temperature is increased. All other conditions stay the same. • Magnesium ribbon is used instead of magnesium powder. All other conditions stay the same.
(d)[4]
Hydrochloric acid reacts with calcium carbonate. Name the products of this reaction and state the observations.