Two experiments are carried out to study the reaction between zinc and sulfuric acid. experiment 1 Small lumps of zinc are added to excess dilute sulfuric acid. experiment 2 The reaction is carried out at a lower temperature and with one other change. Both experiments produce the same total volume of gas and are completed in the same time. What is the second change made in experiment 2 ?
A.
A catalyst is added.
B.
A greater mass of zinc is added.
C.
A greater volume of sulfuric acid is added.
D.
Larger lumps of zinc are used.
Exam No：9701_m24_qp_12 Year：2024 Question No：15
Answer:
A
Knowledge points:
8.1.1 explain and use the term rate of reaction, frequency of collisions, effective collisions and non-effective collisions
8.1.2 explain qualitatively, in terms of frequency of effective collisions, the effect of concentration and pressure changes on the rate of a reaction
8.1.3 use experimental data to calculate the rate of a reaction
Solution:
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