Le Chatelier's Principle

Question 1

A forward reaction

Answer 1

reactants move from left to right (as represented by arrows in equation)

Question 2

A backwards reaction

Answer 2

reactants move from right to left (as represented by arrows in equation)

Question 3

Equilibrium

Answer 3

A closed system is when nothing can get in or out -> concentration of products and reactants remain constant -> when two reactions are happening simultaneously in a closed system, and the forward reaction rate is equal to the backward reaction rate.

Question 4

What is Le Chatelier’s Principle?

Answer 4

If a system is at equilibrium and a change is made to any of the conditions, then the system responds to counteract the change.

Question 5

CONCENTRATION: if the concentration of chemical x is increased, the position of the _____ shifts….

Answer 5

equilibrium shifts in the direction away from chemical x

Question 6

CONCENTRATION: if the concentration of chemical x is decreased, the position of the _______

Answer 6

equilibrium, shifts in the direction towards chemical x

Question 7

PRESSURE: In a reaction involving gases, if the pressure is increased, the position of the _________ shifts in the direction of the

Answer 7

equilibrium

fewer molecules of gas

Question 8

PRESSURE: If the pressure is decreased, the position of the ________ shifts in the direction of

Answer 8

equilibrium

more molecules of gas

Question 9

TEMPERATURE: If the temperature is increased, the position of the equilibrium shifts in the direction of the e____________ p_________

Answer 9

endothermic process

Question 10

TEMPERATURE: If the temperature is decreased, the position of the equilibrium shifts in the direction of the…

Answer 10

exothermic process

Question 11

A catalyst does not affect…

Answer 11

equilibrium - just rate