Ch2 Chemical Equilibrium

Question 1

KC

Answer 1

[A}^a [B]^b

Question 2

Kc is unaffected by

Answer 2

change in concentration
presence of a catalyst
change in pressure

Question 3

Kc affected by

Answer 3

temperature

Question 4

How to measure equilibrium

Answer 4

pH meter
change in colour
change in electrical conductivity

Question 5

Why titration can’t measure equilirbium

Answer 5

removal of H+ ions causes equilibrium to rebalance

only can be used when equilibrium is slow to form

Question 6

Experimental methods condition

Answer 6

• equilibrium must not be disturbed by any measurement taken
• position must be determined by measuring physical property

Question 7

Partial pressure

Answer 7

pressure that would be exerted by a gas in a mixture if it occupied the same volume on its own at the same temperature

Sum of partial pressure of components in equilibrium = total pressure

Question 8

Partial pressure formula

Answer 8

mole fraction of gas x total pressure of equilibrium mixture

Question 9

Mole fraction

Answer 9

amount in moles of a component in a mixture divided by the total amount of all components in moles in the mixture

Question 10

Kp

Answer 10

[PA]^a [PB]^b