HELPP PLS WITH GIVE POINTS AND BRAINLIEST‼️‼️‼️‼️ 2 A student performed two experiments to establish how
effective manganese(iv) oxide was as a catalyst for the
decomposition of hydrogen peroxide. The results below
were obtained by carrying out these experiments with
two different quantities of manganese(iv) oxide. The
volume of the gas produced was recorded against time.
Time/s
0
30
60
90 120 150 180
210
0
29
55
79
98
118 133
146
Volume
for 0.3g/
cm
Volume
for 0.5g/
cm
0
45
84
118 145 162 174 182
a Draw a diagram of the apparatus you could use to
carry out these experiments.
b Plot a graph of the results.
c Is the manganese(IV) oxide acting as a catalyst in this
reaction? Explain your answer.
d (i) At which stage does the reaction proceed most
quickly?
(ii) How can you tell this from your graph?
(iii) In terms of particles, explain why the reaction is
quickest at the point you have chosen in (i).
e Why does the slope of the graph become less steep as
the reaction proceeds?
f What volume of gas has been produced when using
0.3g of manganese(iv) oxide after 50 s?
g How long did it take for 60 cm of gas to be produced
when the experiment was carried out using 0.5g of
the manganese(iv) oxide?
h Write a balanced chemical equation for the
decomposition of hydrogen peroxide.