Factors that Affect the Rate of Reaction (2)

Factors affecting rate of reaction -size of reactants (1)

Solid reactants can undergo change in sizes

Factors affecting rate of reaction -size of reactants (2)

A piece of marble chip can be cut into smaller pieces

Factors affecting rate of reaction -size of reactants (3)

The total surface area of all the smaller pieces is larger than the total surface area of the original piece of marble

Factors affecting rate of reaction -size of reactants (4)

For a fixed mass, the powdered form has a larger total surface area than the original pieces of the solid

The effect of size of reactants on the rate of reaction

The smaller the size of reactants, the higher the rate of reaction

Factors affecting rate of reaction - concentration (1)

The concentration of a solute in a solution can be changed

Factors affecting rate of reaction - concentration (2)

The concentration of the solution can be changed by adding solvent or solute

Factors affecting rate of reaction - concentration (3)

The effect of concentration of reactants on the rate of reaction

The higher the concentration of reactants, the shorter the time taken for the ‘’ mark to disappear from view

Factors affecting rate of reaction - temperature (1)

Most reactions occur faster at high temperatures