Law of Chemical Equilibrium

The video tutorial explains the law of mass action, which relates the concentration of reactants and products at chemical equilibrium. It introduces the equilibrium constant KC, expressed in moles per liter, and derives the expression for KC using stoichiometric coefficients. The tutorial discusses the rates of forward and backward reactions and shows how the equilibrium constant is derived from these rates.

What does the Law of Mass Action relate to in a chemical reaction?

• The speed of the reaction

• The concentration of reactants and products

• The temperature of the reaction

• The pressure of the system

What is represented by the symbol KC in chemical equilibrium?

• Rate constant of the reaction

• Pressure constant

• Equilibrium constant expressed in concentration

• Temperature constant

In the expression for equilibrium constant, what do the brackets around reactants and products signify?

• Their atomic numbers

• Their molar concentrations

• Their molecular weights

• Their physical states

What is the relationship between the rate of forward and backward reactions at equilibrium?

• Both rates are equal

• Rates are unrelated

• Backward rate is greater

• Forward rate is greater

How is the equilibrium constant KC derived from the rates of forward and backward reactions?

• By multiplying the rates

• By dividing the forward rate constant by the backward rate constant

• By subtracting the backward rate from the forward rate

• By adding the rates