9.1.1 - Rate of reaction Flashcards
What is the collision theory?
Particles must collide with sufficient activation energy and in the right orientation for a reaction to occur.
How can the rate of a reaction be increased?
Add a catalyst
Increase temperature
Increase concentration
For gases, increase pressure
Why is the initial rate of reaction fast between magnesium and hydrochloric acid?
Concentration of reactants is highest.
So more successful collisions
Why does the rate of reaction between Mg and Hcl slow down?
Concentration of reactants decreases so less successfsul collisions.
What happens if particles collide but with the incorrect orientation?
No reaction occurs
How does increasing concentration result in a higher rate of reaction?
There are more reactants so therefore an increased frequency of successful collisions.
How does increasing the temperature affect rate of reaction?
Particles have increased kinetic energy so therefore a higher frequency of collisions.
