What normally happens to the rate of the forward reaction as a reaction proceeds?
As the reaction proceeds the rate decreases with time
This is because the reactants of the chemical reaction(the chemicals that are mixed together are the reacting chemicals or reactants) are at its high in concentration at the start of the reaction. These reactants are constantly being used to make products. Therefore the concentration of these reactants will decrease until all the reactants are used up and the reaction comes to a stop.
However if the reactions is in a state of equilibrium the concentration of products and reactions will be the same