Catalysts (AQA GCSE Chemistry Combined Science): Flashcards
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Practise the cards
14 cards from this deck
What do catalysts do to chemical reactions?
What do catalysts do to chemical reactions?
Speed them up
Are catalysts used up during reactions?
Are catalysts used up during reactions?
No
How catalysts work (mechanism)
How catalysts work (mechanism)
Provide an easier pathway for the reaction
Activation energy without a catalyst
Activation energy without a catalyst
High
Activation energy with a catalyst
Activation energy with a catalyst
Lower
What catalysts provide for reactions
What catalysts provide for reactions
An alternative reaction pathway
Energy diagram feature showing catalyst effect
Energy diagram feature showing catalyst effect
Lower peak (reduced activation energy)
Do catalysts appear in chemical equations?
Do catalysts appear in chemical equations?
No
Catalyst specificity principle
Catalyst specificity principle
Different reactions need different catalysts
Name for catalysts in biological systems
Name for catalysts in biological systems
Enzymes
How to test if something is a catalyst
How to test if something is a catalyst
Weigh before and after - mass should be the same
Catalyst for hydrogen peroxide decomposition
Catalyst for hydrogen peroxide decomposition
Manganese oxide ()
Why more particles react with a catalyst
Why more particles react with a catalyst
Lower activation energy means more successful collisions
Can catalysts be used repeatedly?
Can catalysts be used repeatedly?
Yes, they can be used again and again