C5.2.5 - Catalysts And Reaction Rate Flashcards

1
Q

What is a catalyst?

A

A catalyst is a substance which increases the rate of a reaction without changing itself

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2
Q

Why do specific catalysts have to be used?

A

Some catalysts may not be able to catalyse certain types of reactions

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3
Q

What elements do catalytic converters use?

A

Platinum, Rhodium, Palladium

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4
Q

Why are metals such as platinum and rhodium coated onto a ceramic ‘honeycomb’ to be catalysed?

A

As they are very expensive, so coating them onto a honeycomb allows the catalysts to get the most out of them due to the high surface area and allowance of exhaust gases passing through

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5
Q

What are enzymes?

A

Proteins that act as catalysts in biological systems

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6
Q

What does catalase do?

A

Catalyses the decomposition of hydrogen peroxide

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7
Q

Where is catalase contained?

A

In liver cells

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8
Q

What do catalysts do to the amount of activation energy required?

A

It decreases it

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9
Q

What do catalysts do to the rate of successful collision in a reaction?

A

It increases it

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