Exam code: 9701
Iron acts as a catalyst in the Haber process.
Complete the diagram to show the electron configuration of an atom of 
.
State and explain whether the iron used in the Haber process acts as a homogeneous or heterogeneous catalyst.
Describe the mode of action of a heterogeneous catalyst in a chemical reaction.
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Define the term homogeneous catalysis.
Describe the mode of action of a homogeneous catalyst.
Suggest one advantage and one disadvantage of using a homogeneous catalyst rather than a heterogeneous catalyst in an industrial process.
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Larger hydrocarbon molecules are cracked into smaller alkanes and alkenes by passing their vapours over a heated catalyst.
Identify a suitable catalyst for this reaction.
State and explain whether this process is an example of homogeneous or heterogeneous catalysis.
Explain why using a powdered solid catalyst increases the rate of this reaction.
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