## Le Chateliers Principle Practice Problems

In the previous post, we talked about Le Châtelier’s principle that helps evaluate the effect of changing the concentrations, volume, pressure, and temperature on the equilibrium.  In short, you need to remember that if a system at equilibrium is disturbed, … Read more

## Le Chateliers Principle

Le Châtelier’s principle states that a system at equilibrium does not want to be disturbed. So, if we try to interfere with a system at equilibrium, it will minimize the effect of the action to reestablish the equilibrium. We can … Read more

## ICE Table Practice Problems

In the previous post, we talked about ICE tables which we use for determining the equilibrium concentrations based on the equilibrium constant, reaction quotient, and the initial concentrations of the reactants and products. Below are some additional practice examples on … Read more

## Reaction Quotient Q – Predicting the Direction of Reaction

To predict the direction of a reaction before an equilibrium is reached, the reaction quotient is used. It is given by the same expression as the equilibrium constant, however, instead of the equilibrium concentrations, the initial concentrations are used. For … Read more

## ICE Tables – Calculating Equilibrium Concentrations

We saw, in the previous post, how the reaction quotient is used to predict the direction of a reaction before an equilibrium is reached. To do so, we plug the values of initial concentrations in the expression of the equilibrium … Read more

## Kp – Equilibrium Constant and Partial Pressure

The first studies and the observations of patterns in the ratio of the products and reactants were made in 1864 by Norwegian mathematician Cato Guldberg and a chemist Peter Waage when working on reactions of gases. They noticed that in … Read more

## Equilibrium Constant K from Two Reactions

Some reactions can be represented as a sequence of two or more relations. For example, let’s consider the following reaction between NOBr and Cl2 gases:   2NOBr(g) + Cl2(g) ⇆ 2NO(g) + 2 BrCl(g)   We can represent this net … Read more

## Equilibrium Constant K Changes with Chemical Equation

The value of the equilibrium constant is always given for the specific chemical equation demonstrating the reaction. The direction of the reaction and the coefficients in the balanced chemical equation affect the expression and the value of the equilibrium constant. … Read more

## Kp and Kc Relationship

We mentioned in the previous post that the equilibrium-constant expression can be formulated in terms of partial pressures when the reactants and products in a chemical reaction are gases. For example, when the equilibrium constant of the reaction between sulfur … Read more

## Equilibrium Constant

In the previous post, we talked about the concept of chemical equilibrium which is reached when the rates of forward and reverse reactions are equal and thus the concentrations of the reactants and products stay constant.   Now, we say … Read more