In writing the equilibrium constant expression we use square brackets. The notation [A] means which of the following?

Question

Quizplus · Accepted Answer

The notation [A] represents the molar concentration of A. This is usually denoted as moles of A per liter of solution. The equilibrium constant expression is written in terms of the concentrations of reactants and products, hence [A] denotes the molar concentration, and not the mass or number of moles.

In Writing the Equilibrium Constant Expression We Use Square Brackets