A Chemical reaction is the process that produces a chemical change.The rate of a reaction is the speed at which a reaction happens. If a reaction has a low rate that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, maybe even thousands of years while other can happen in less than one second. The rate of reaction depends on the type of molecules which are combining.
We conducted an experiment to test the rate of reaction when Mg is added to Hcl (aq). The Formulae for this reaction is 2Hcl (aq) + Mg = MgCl2 + H2.