How is Le Chatelier's principle used to obtain k?

Le Chatelier's principle states that if a system at equilibrium experiences a change in concentration, temperature, or pressure, the system will shift to counteract that change and restore a new equilibrium. To obtain the equilibrium constant ( k ), one can manipulate the conditions of a reaction (such as changing concentrations or temperatures) and observe how the system shifts to re-establish equilibrium. By measuring the concentrations of reactants and products at this new equilibrium state, one can calculate ( k ) using the expression ( k = \frac{[products]}{[reactants]} ), where the concentrations are raised to the power of their coefficients in the balanced chemical equation.