(a(i))[1]
Deduce the volume of carbon dioxide gas given off after 2 minutes.
(a(ii))[2]
Draw a line on the grid in Fig. 6.1 to show the volume of carbon dioxide released when hydrochloric acid with a higher concentration is used.
(b(i))[1]
Describe how the rate of reaction differs when smaller pieces of magnesium carbonate are used.
(b(ii))[1]
Describe how the rate of reaction differs when the temperature is 10 ^{\circ}C.
(c)[2]
Complete the word equation for this reaction.\n\nhydrochloric acid + iron → [BLANK] + [BLANK]
(d)[2]
State what is meant by the term catalyst.