5.1.2 How Far

Question 1

how do you find the units for Kc

Answer 1

1) substitute the units into the Kc expression
2) cancel out common units and show the final units in a single line

• remember, all concentrations are given as mol dm-3
• and you can have no units

Question 2

what is homogeneous equilibrium

Answer 2

contains equilibrium species that all have the same state/phase

-Kc would contain ALL species

Question 3

what is heterogeneous equilibrium

Answer 3

• contains equilibrium species that have different states
• for calculating Kc, you ONLY USE gases and aqueous species, as concentrations of solids and liquids are essentially constant, so are automatically incorporated into the total expression