Pure solids and pure liquids are excluded from K expressions.
What is the correct equilibrium expression?
- Acheck_circle
K = [CO2]
- B
K = [CaO][CO2]/[CaCO3]
- C
K = [CO2]/[CaCO3]
- D
K = [CaO][CO2]
Explanation
Pure solids do not appear in K. Only the gaseous CO2 contributes: K = [CO2] (or Kp = P_CO2).