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Flashcards in Equilibrium Deck (13)
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1

Equilibrium

A chemical reaction when concentrations of reactants and products are constant. When the froward and reverse reactions occur at equal rates.

In a closed system

2

Le chateliers principle

When a system at equilibrium is placed under stress the system will undergo a change in such a way to relieve that stress and restore a state of equilibrium.

3

Change in temperature as a stress

Increasing temperature will shift in the direction that decreases energy.

Decreasing temperature will shift in the direction of energy.

4

Change in concentration as a stress

Adding a reactant or product will shift in direction that removes them.

ONLY FOR AQ AND Q

5

Catalysts as a stress?

Don’t affect anything

6

Change in pressure as a stress

Increase pressure- Shifts to fewer moles
Decrease pressure- shifts to more moles

7

As you decrease volume you...

Increase pressure

8

Keq

Represents the ratio of product concentrations to reactant concentrations at equilibrium.

ONLY FOR AQ AND Q

9

Keq~=1
Keq>1
Keq<1

Equilibrium
Products favoured
Reactants favoured

10

Reaction quotient

Used to determine whether a reaction has reached equilibrium and if not, predicts which way it shifts.

11

Keq =Q
Keq>Q
Keq

Equilibrium
Shifts right
Shifts left

12

Necessary conditions for dynamic equilibrium

-Closed system
-Rate of forward equals rate of reverse
-Macroscopic properties: colour, pressure, concentration, and PH are constant.
-Either direction can establish

13

List some practical applications of equilibrium

-Hemoglobin and oxygen in the blood
-Blood PH
-Chicken eggs