5 10 15 20 25 30 40 60 100 150 Time(s) Volume of H 30 50 65 75 83 89 94 100 101 1 101 collect (a) (b) (c) (d) (e) (f) (g) Sketch the experimental set-up. Plot the volume of hydrogen gas collected against the time taken. State the time taken for the reaction to reach completion. Explain the gradual decrease of the reaction rate with time. Why did the student stop taking readings at 5-second intervals after 30 seconds? Explain the importance of taking readings until two successive readings agree. On the same axes, sketch and explain the curve that would be obtained (i) a higher temperature, (ii) a lower acid concentration.​