how to find equilibrium expressions crash course

How to write equilibrium expressions?

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How do you calculate the equilibrium constant of a reaction?

Nov 11, 2019 · Equilibrium Equations: Crash Course Chemistry #29. In which Hank shows you that, while it may seem like the Universe is messing with us, equilibrium isn’t a cosmic trick. Here, he shows you how ...

How do you write the general equilibrium equation for KC?

Aug 27, 2013 · In this episode of Crash Course Chemistry, Hank goes over the ideas of keeping your life balance... well, your chemical life. Equilibrium is all about balanc...

How do you find the final equilibrium concentration?

Equilibrium Equations: Crash Course Chemistry #29. Fortunately for us, chemists have already figured out the equilibrium constants for most common reactions.

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What is the equilibrium constant?

When an equilibrium constant is calculated from equilibrium concentrations, molar concentrations or partial pressures are substituted into the equilibrium constant expression for the reaction. Equilibrium constants can be used to calculate the equilibrium concentrations of reactants and products by using the quantities or concentrations of the reactants, the stoichiometry of the balanced chemical equation for the reaction, and a tabular format to obtain the final concentrations of all species at equilibrium.

What is the learning objective of equilibrium?

Learning Objective. To solve quantitative problems involving chemical equilibriums. There are two fundamental kinds of equilibrium problems: (1) those in which we are given the concentrations of the reactants and the products at equilibrium (or, more often, information that allows us to calculate these concentrations), ...

Do reactants have the same initial concentration?

Often, however, the initial concentrations of the reactants are not the same, and/or one or more of the products may be present when the reaction starts. Under these conditions, there is usually no way to simplify the problem, and we must determine the equilibrium concentrations with other means.

How do chemists study gas phase equilibria?

Chemists usually study gas-phase equilibria by following the partial pressures of the gases in the reaction. We can understand why this is possible by rearranging the ideal gas equation to give the following relationship between the pressure of a gas and its concentration in moles per liter.

What happens when a reaction reaches equilibrium?

Since the reaction proceeds in both directions at the same rate, there is no apparent change in the concentrations of the reactants or the products on the macroscopic scale the level of objects visible to the naked eye. This model can also be used to predict the direction in which a reaction has to shift to reach equilibrium.

Which side of the equation is the reaction reagent on?

Even though chemical reactions that reach equilibrium occur in both directions, the reagents on the right side of the equation are assumed to be the "products" of the reaction and the reagents on the left side of the equation are assumed to be the "reactants."

Where are the products of a reaction always written?

The products of the reaction are always written above the line in the numerator. The reactants are always written below the line in the denominator. For homogeneous systems, the equilibrium constant expression contains a term for every reactant and every product of the reaction.

Do reactions stop when they come to equilibrium?

Reactions don't stop when they come to equilibrium. But the forward and reverse reactions are in balance at equilibrium, so there is no net change in the concentrations of the reactants or products, and the reaction appears to stop on the macroscopic scale. Chemical equilibrium is an example of a dynamic balance between opposing forces ...