16 8
Jan and Mike investigate the reaction between magnesium lumps and hydrochloric acid, HCl. Magnesium chloride solution, MgCl2, and hydrogen gas, H2, are made. (a) Write a balanced symbol equation for this reaction. .............................................................................................................................................. [2] (b) Look at the diagram. It shows the apparatus they use.
gas syringe dilute hydrochloric acid magnesium
Look at the graph of their results 120 110 100 90 80 volume of hydrogen given off in cm3
70 60 50 40 30 20 10 0
0
10
20
30
40
50
60
time in seconds
Š OCR 2013
70
80
90
100