Question

fill in the missing words
a double arrow in the chemical equation indicates that the reaction is blank. for such a reaction, when the state of equilibrium is reached, both reactions are proceeding at the same rate and concentrations of reactants and products blank.

Explanation:

A double - arrow in a chemical equation represents a reversible reaction. In a reversible reaction at equilibrium, the forward and reverse reactions occur at the same rate, and the concentrations of reactants and products remain constant.

Answer:

1. reversible
2. remain constant