Rates Of Reaction Flashcards
What happens if you decrease concentration
The rate of reaction decreases because there will be less particles so less successful collisions
What happens if you increase temperature
The reaction rate increased because the particles have more energy so have more successful collisions
What is a catalyst
A substance used to increase chemical reactions
Do catalysts take part in the reaction
No
Are catalysts changed during a reaction
No
What is a homogenous catalyst
A catalyst that works the same state as the reactants
What is a heterogeneous catalyst
A catalyst that works on different state than the reactions
What is an enzyme
A biological catalyst
Why are catalysts used in car exhaust systems
To change harmful gases to harmless gases
Carbon monoxide to carbon dioxide
What happens to the reaction rate as a reaction proceeds
The reaction rate decreases because the concentration of reactants decreases
How do you calculate the average rate of reaction
Measures change
Over
Time taken for the change
What happens if you decrease particle size
The reaction rate increases because the surface area increases meaning there will be more successful collisions
