6
(d) The graph shows the effect of temperature on the rate of the reaction of hydrochloric acid with
iron.
25-
20-
rate of reaction
in cm³ hydrogen
/min
16
15-
10-
5-
0+
0
10
110
20
20
30
40
temperature/°C
(i) Describe the effect of temperature on the rate of this reaction.
+59
50
9-9
60
70
10
[2]