11A. Equilibrim II [SET 1]

Question 1

What is Kc?

Answer 1

The equilibrium constant

Question 2

What is kc calculated from?

Answer 2

The ratio of product concentration to reactant concentration

Question 3

What is Kc a constant for?

Answer 3

A given temperature

Question 4

What is a homogeneous equilibrium?

Answer 4

One where all the reactants and products are in the same state

Question 5

What is a heterogeneous equilibrium?

Answer 5

One where the products and reactants aren’t all in the same state

Question 6

Why are solids and pure liquids not included in Kc expressions?

Answer 6

Because their concentrations stay the same throughout the reaction

Question 7

How would you calculate a value for Kc?

Answer 7

Put the concentrations into the expression and calculate using them

Question 8

What can Kc be used to find?

Answer 8

Concentrations in an equilibrium mixture

Question 9

What can Kc be calculated from?

Answer 9

Experimental data

Question 10

What is the total pressure of a gas mixture equal to?

Answer 10

The sum of all the partial pressures of the gases

Question 11

What can partial pressure be worked out from?

Answer 11

Mole fractions

Question 12

What is a mole fraction?

Answer 12

The proportion of a gas mixture that is of a particular gas

Question 13

How is the mole fraction calculated?

Answer 13

No. Of moles of gas/total no. Of moles of gas

Question 14

How is partial pressure calculated?

Answer 14

Mole fraction of gas x total pressure

Question 15

What is Kp?

Answer 15

An equilibrium constant that is used when dealing wth gases

Question 16

How is Kp calculated?

Answer 16

From partial pressures of the gases

Question 17

What can Kp be used to find?

Answer 17

Partial pressures

Question 18

What does Kp for heterogeneous equilibrium include?

Answer 18

Only the gases

Question 19

What happens to equilibrium if the conditions change?

Answer 19

The position of it moves

Question 20

What factors affect equilibrium?

Answer 20

Concentration, pressure and temperature

Question 21

If the temperature increases, where does equilibrium move to?

Answer 21

The endothermic side of the reaction

Question 22

If pressure increases, where does equilibrium move to?

Answer 22

The side with fewer moles of gas

Question 23

What does the size of the equilibrium constant tell you?

Answer 23

Where the equilibrium lies

Question 24

The greater the Kc/Kp…

Answer 24

…the further to the right the equilibrium lies

Question 25

The small the value of Kc/Kp…

Answer 25

…the further tot he left the equilibrium lies

Question 26

What does the equilibrium constant for a reaction rely on?

Answer 26

The temperature of the reaction

Question 27

What happens in a reaction if concentrations change?

Answer 27

The concentrations of other reactants/products change in order to keep Kc the same

Question 28

How do concentration/pressure affect Kc/Kp?

Answer 28

The have no effect

Question 29

How do catalysts affect the position of equilibrium?

Answer 29

They have no effect

Question 30

Why do concentration and pressure not affect Kc/Kp?

Answer 30

Because although the amounts of products/reactants change, the ratio of reactants to products stays the same