Rates Of Reaction Flashcards
Factors affecting the rate of reaction
Concentration of reactants Surface area Temperature Use of catalysts Influence of lights
Ways of measuring rate of reaction
How much reactant is used up
How much product is formed…in a certain time period
The effect of temperature on the rate of reaction
The hotter the solution the faster the rate of reaction is.
This is because when a liquid is heated, the particles gain energy and therefore collide with each other harder and faster.
What is the activation energy?
The activation energy is the minimum amount of energy required for a reaction to occur
How does the collision theory explain the effect of surface area on rate of reaction?
When surface area is increased
There are more frequent collisions
Therefore more successful collisions Therefore faster rate of reaction
Explain the effect of adding a catalyst on rate of reaction.
A catalyst provides an alternative route..
…with a lower activation energy…
… Which means there are more successful collisions with the required activation energy…
… Therefore there is a faster rate of reaction!
Is a catalyst used up in a reaction?
The catalyst is NOT used up in the reaction it can be recycled and used again
