3b (rates of reaction) Flashcards
1
Q
Effect of temperature on rate
A
- Increasing temperature increases the rate (gain KE)
- Collision frequency increases
- More collision are successful
2
Q
Why do rates slow down?
A
- As the reaction goes on the rate decreases
- Concentration of any solution / acid present decreases as is the surface area of any solid
3
Q
rate of reaction =
A
amount of reactant used or amount of product formed / time
4
Q
What increases the rate of a reaction?
A
- Increasing the surface area of solid
- Increasing the concentration of a solution
- Increasing the pressure of a gas
- Increasing the temperature
- Using a catalyst
5
Q
Effect of surface area:
A
- More particles exposed
- More frequent collisions
- Increase rate
6
Q
Effect of concentration or pressure:
A
- More particles in the same space
- More frequent collisions
- Increase rate
7
Q
Catalyst
A
A substance that speeds up a chemical reaction by providing an alternative pathway with lower activation energy while remaining chemically unchanged at the end of
the reaction.
