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Introduction to Chemical Equilibrium

Introduction to Chemical Equilibrium

Author: carolyn fruin


Learning Targets:

  • I can state that in a reversible reaction, both forward and reverse reactions are taking place
  • I can state what is equal at equilibrium (the forward reaction rate = the reverse reaction rate.
  • I can describe how we know when a reaction is at equilibrium (constant macroscopic properties).
  • I can write the equilibrium expression, Keq, of a given reaction.

aA + bB <--> cC + dD

  • I can explain that we do not include solids and liquids in the Keq, because their concentrations do not change and are therefore part of the Keq.
  • I can calculate the value of Keq given the concentrations of the reactants and products at equilibrium.
  • I can explain that only temperature can change the Keq value.
  • I can determine whether a reaction is reactant-favored, product-favored or approximately equal (products and reactants) at equilibrium by looking at the value of Keq or looking at the graph of concentrations.
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Chemical Equilibrium Powerpoint

Equilibrium Notes


Equilibrium Expressions

This video covers the basic equilibrium expression as well as how to solve for the constant given molarity values.

Source: KhanAcademy

Calculating Keq

A simple demonstration of solving Keq given equilibrium concentrations for a reaction.