NSCI 1322 Lecture Notes - Lecture 51: Cato Maximilian Guldberg, Peter Waage, Stoichiometry

• School: Fordham University
• Department: Natural Science
• Course: NSCI 1322
• Professor: Marie Thomas

Document Summary

The equilibrium-constant expression for a reaction is an expression obtained by multiplying the concentrations of products, dividing by the concentrations of reactants, and raising each concentration term to a power equal to the coefficient in the chemical equation. The equilibrium constant is the value obtained for the equilibrium-constant expression when equilibrium concentrations are substituted. The law of mass action is a relation that states that the values of the equilibrium- constant expression are constant for a particular reaction at a given temperature, whatever equilibrium concentrations are substituted. You can write the equilibrium-constant expression given any balanced chemical equation. Write the concentrations of products in the top (numerator) of the equilibrium-constant expression, and write the concentrations of reactants in the bottom (denominator). Raise each concentration term to the power equal to the coefficient of the substance in the chemical equation. Note that concentrations of products are on the top and concentrations of reactants are on the bottom.