What does it mean by Keq? Pls need an explanation with this. I'm a little bit confused. Thanks

Constant equilibrium equation. - now at least you can type it into google :)

Keq = (concn right side)/(concn left side) and coefficients become exponents.

Keq, or the equilibrium constant, is a quantitative measure used to describe the extent of a chemical reaction at equilibrium. It provides information about the relative concentrations of reactants and products present in a system once equilibrium has been reached.

To calculate Keq, you need to know the balanced chemical equation for the reaction at equilibrium. Keq is determined by taking the ratio of the concentrations (or partial pressures, depending on the nature of the equilibrium) of the products to the concentrations of the reactants, with each concentration raised to the power of its stoichiometric coefficient.

For example, consider the reaction:

aA + bB ⇌ cC + dD

The equilibrium constant expression is:

Keq = [C]^c [D]^d / [A]^a [B]^b

In this equation, [C], [D], [A], [B] represent the molar concentrations of the respective species. The values of a, b, c, and d are the stoichiometric coefficients of the balanced equation.

The numerical value of Keq provides information about the position of equilibrium. If Keq is large, it means that the products are favored at equilibrium. Conversely, if Keq is small, it means that the reactants are favored. If Keq is equal to 1, it indicates that the concentrations of the reactants and products are roughly equal at equilibrium.

It's important to note that the temperature affects the value of Keq. As the temperature changes, the equilibrium position and consequently the value of Keq can also change.