5.1.2 - How far

Question 1

Calculating Kc

Answer 1

ICEE table
Inital moles
Change in mol
Equilbrium mol
Eqm conc (eqm mol/ vol.)

Question 2

Units of conc

Answer 2

moldm^-3

Question 3

Kp

Answer 3

Kc for gases

(pC)^c * (pD)^d / (pA)^a * (pB)^b

Question 4

Mole fraction

Answer 4

Number of moles in A/ total no. of moles

Question 5

Partial pressure

Answer 5

Mole fraction * total pressure

Question 6

Kp in heterogenous equilibria

Answer 6

Do not include solids or liquids in final Kp expression

Question 7

Explain in terms of Kc what happens to the eqm if temp is increased/ decreased

Answer 7

If reaction is exo/endo increase/decrease in temp shifts the eqm to lhs/rhs
As a result there will be more … which increases the denominator/numerator of the Kc expression
Kc will decrease/ increase

Question 8

Explain what happens in terms of Kc to the eqm if conc is changed

Answer 8

Kc doesn’t change, only changes w/ temp
Increasing the conc of … increases the numerator/denominator of the Kc exp.
The eqm. shifts towards the left/right so more – will be made to restore eqm

Question 9

Explain what happens in terms of Kc to the eqm if pressure changes

Answer 9

Kp doesn’t change only changes with temp
increasing pressure, increases all conc.n
The d/n will increase more than the n/d
The eqm shifts to the left/ right and makes more … to restore the eqm

Question 10

Is the dissociation of water (Kw) exo/endo

Answer 10

Endo as the value of Kw increases with temp

Question 11

Units of kP

Answer 11

atm or kPa