3.2.2. Reaction rates Flashcards
1
Q
What is meant by rate of reaction?
A
Change in concentration of reactants or products over time
2
Q
What is the effect of concentration on the rate of reaction, in terms of frequency of collision
A
An increase in concentration increases the number of particles in the same volume, the particles are closer together and collide more frequently. The frequency of successful collisions increases.
3
Q
How to calculate of reaction rate from a graph
A
Draw a tangent to the curve, the gradient of the tangent gives the reaction rate
4
Q
What does a catalyst do?
A
A catalyst increases reaction rate without being used up by the overall reaction.
5
Q
How does a catalyst increase the rate of reaction?
A
Provides an alternative reaction pathway with a lower activation energy
6
Q
A
