general definitions

Question 2

What is a reversible reaction?

Answer 2

A reaction where the product can re-form into the reactants

Question 3

What is Le Chatelier’s Principle?

Answer 3

When the system is stressed, the new equilibrium shifts to be less stressed

Question 4

Define chemical equilibrium

Answer 4

the state where the concentrations of all reactants and products remain constant with time

Question 5

All reactions carried out in a closed vessel ____ reach equilibrium

Answer 5

will

Question 6

if little product is formed, where will equilibrium shift?

sometimes

Answer 6

far left

Question 7

if little reactant remains, where will equilibrium shift?

sometimes

Answer 7

far right

Question 8

At dynamic equilibrium, reactions ____ to take place

forward AND reverse reactions

Answer 8

continue

Question 9

What happens to the rate of forward + reverse reactions once they reach dynamic equilibrium?

Answer 9

They occur at the same rate

Question 10

What factors can effect equilibrium?

Answer 10

temperature, pressure and concentration

Question 11

How to pure liquids/solids effect hetergenous equilibria?

Answer 11

They don’t, they are not accounted for in the calculation or expression

Question 12

Pure liquids ____ the same as solutions, which can have a change in concentration

Answer 12

are not

Question 13

what is the symbol for equilibrium?

Answer 13

<–>

Question 14

Using A+B <–> C+D:
What would happen to C at equilibrium if we added more A?

Answer 14

Adding A increases the amount of C and D at equilibrium

Question 15

Using A+B <–> C+D:
What would happen to A at equilibrium if we added more C?

Answer 15

Adding more C increases the amount of A and B at equilibrium

Question 16

Using A+B <–> C+D:
What would happen to B at equilibrium if we added more A?

Answer 16

Since A reacts with B to for C and D, adding more A decreases B

Question 17

How can you change pressure of a solution at equilibrium?

Answer 17

1, Add or remove a gaseous reactant or product

#2, Add an inert gas, (one not involved in the reaction)
#3, Change the volume of the container

Question 18

What effect does changing the pressure have?

Answer 18

Equilibrium shifts to the side with fewer moles of gas

Question 19

In an exothermic reaction, which way will the equilibrium shift?

Answer 19

To the left

Question 20

In an endothermic reaction, which way will equilibrium shift?

Answer 20

To the right

Question 21

Between concentration, pressure and temperature, which will effect the K value?

Answer 21

Temperature

Question 22

What can change in pressure only apply to?

Answer 22

Gaseous reactions