CHAPTER 31: GASES AND BIOCHEMICAL REACTIONS 2 Study the graph showing the production of oxygen gas and answer the questions that follow.


100 80 60 40 20


30 60 90 120 150 180 210 240 270 300 Time (s)


Catalyst A Catalyst B Catalyst C


a. What variable is being examined in this experiment?


b. From your study of different catalysts in the textbook, suggest three catalysts which could have been used for the production of oxygen from hydrogen peroxide.


c. What was the volume of O2


produced by each of the different reactions A–C?


d. Which reaction happened the quickest? Justify your answer.


146


UNIT 8: CYCLES


CHEMICAL WORLD


Volume of O2


produced (cm3


gas )


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