Soln:

The rate of chemical reaction reactions is affected by

a. Concentration

• Is the number of molecules in a given solution

• The high concentration, the high rate of chemical reaction.

b. Temperature.

• Is the coldness or hotness of the body. The high temperature (more hotness of the body) the high rate of chemical reaction.

c. Catalyst.

• Is a chemical substance that speed up the rate of chemical reaction.

• The presence of catalyst such as vanadium pentoxide (V2O5) influence high rate of production of Sulphur trioxide from Sulphur dioxide.

25O₂ + O₂ →V₂O₅ ← 25O₃.