Unit D: Chemical Equilibrium + Acid/Base Systems Module 7

Question 1

Dynamic Equilibrium

Answer 1

when the forward and reverse reactions occur at the same rate

Question 2

Conditions of a dynamic equilibrium system

Answer 2

1. reaction must be reversible
2. system must be closed (no matter can enter/exit)
3. temperature and pressure remain constant

Question 3

Types od Dynamic Equilibrium

Answer 3

phase Equilibrium

solubility Equilibrium

chemical reaction Equilibrium

Question 4

Phase Equilibrium

Answer 4

one chemical substance existing in more than one phase

Question 5

Solubillity Equilibrium

Answer 5

one chemical solute interacting with a solvent substance

Question 6

Chemical Reaction Equilibrium

Answer 6

reactants are converted to products at the same rate as products are converted to reactants

Question 7

Percent Yield

Answer 7

amount of product measured at equilibrium compared w the hypothetical maximum amount of product when the limiting reagents react fully

no reverse reaction / non spontaneity

Question 8

If the percent yield is < 50% then…

Answer 8

reactants are favoured

Question 9

If the percent yield is > 50% then…

Answer 9

products are favoured

Question 10

If the percent yield is >99.9% then…

Answer 10

quantitative

Question 11

The only thing that effects Equilibrium Constant is …

Answer 11

temperature change

Question 12

If Kc = 1 then…

Answer 12

concentration of products = reactants

Question 13

If Kc > 1 then…

Answer 13

concentration of products > reactants

Question 14

If Kc < 1 then…

Answer 14

concentration of products < reactants

Question 15

Homogenous Equilibrium System

Answer 15

all reactants and products are the same state

Question 16

Heterogenous Equilibrium System

Answer 16

more then one state

Question 17

Le Chatelier’s Principle

Answer 17

Any stress placed on an equilibrium system will cause a shift in the system to counteract the stress and form a new equilibrium

Question 18

Increase in pressure causes…

Answer 18

shift to the side with less moles

Question 19

Decrease in pressure causes…

Answer 19

shift to the size with more moles

Question 20

What happens when an inert gas is added to an equilibrium system?

Answer 20

no change because it doesn’t effect concentrations of reactants/products

Question 21

Increase in temp causes…

Answer 21

endothermic reaction to be favoured and increases the Kc

Question 22

Decrease in temp causes…

Answer 22

exothermic reaction to be favoured and decrease in Kc