Factors affecting the rate of reaction

Question 1

What does the rate of reaction depend on

Answer 1

Temperature
Concentration of a solution or the pressure of a gas
Surface area
The presence of a catalyst

Question 2

Why does increasing the temp increase the rate of reaction

Answer 2

As temperature increases, kinetic energy of particles increases, more energetic collisions
The faster they move the more frequent the collisions
However not directly proportional to each other

Question 3

Why does increasing the concentration increase the rate of reaction

Answer 3

Conc increases=Faster reactions
more reactions=More frequent collisions
There are more particles knocking about in the same volume of water

Question 4

What effect does increasing the surface area have on on rate of reaction

Answer 4

Increasing the surface area of solid reactants increases the frequency of collisions and so increases the rate if reaction

Question 5

Why does Using a catalyst increase rate of reaction

Answer 5

Catalysts offer a different pathway for the reaction which decreases the activation energy needed for the reaction to occur.

Question 6

Why does increasing the pressure increase the rate of reaction

Answer 6

The same number of particles occupies a smaller space which makes collisions between them more frequent