Question

what is chemical equilibrium??

Answer 1

Equilibrium is a stage when rate of forward and backward reaction becomes equal. At this stage, the rate at which the amount of reactant converted to product is equal to rate of conversion of product to reactant. For example as shown below in the figure, the rate of formation of HI becomes equal to rate of dissociation of HI. At this stage the two curves become parallel to each other which overlap each other.

Answer 2

Chemical equilibrium is the condition where the rate of the forward reaction equals the rate of the reverse reaction, such that the concentrations of reactants and products in a chemical reaction taking place in a closed system no longer change with time.