Question

Le Chatelier's Principle Date: Course: Section: Instructor Student name: Team members: Prelaboratory assignment 1. Define the following terms: a. Chemical equilibrium b. Le Chatelier's principle 2. Consider the hypothetical reaction A+ B+ heat C+D What will happen to the concentrations of A, B, C, and D under each of the following conditions? A catalyst is added to the system, which is at equilibrium. a. Bither C or D is added to the system, which is initially at equilibrium. b.

Answer 1

Ans 1 :

a) Chemical equillibrium

The reaction is said to have achieved chemical equillibrium when the concentration of any species in the reaction (reactants or products) does not change with time. At such a stage , the rate of forward reaction becomes equal to the rate of reverse reaction.

b) Le Chatelier's Principle

According to Le Chatelier's principle , whenever the reaction at equillibrium is subjected to any change in reaction conditions , the reaction tends to move in a direction where the equillibrium can be re-estabilished again.