IB Multiple Choice - Equilibrium Constants

Test yourself on IB Multiple Choice - Equilibrium Constants

• What is the correct Kc for the above reaction?

• What would C’s concentration be in the described equilibrium mixture at 298 K?

• Calculate the number of grams of HI that are at equilibrium with 1.25 mol of H₂ and 63.5 g of iodine at 448 °C.
  
  H₂ + I₂ ⇌ 2HI
  
  𝐾𝑐 = 50.2 at 448°C.

• What is the minimum mass of CaCO₃ required to establish equilibrium at a certain temperature in a 6.50-L container if the equilibrium constant (Kc) is 0.50 for the decomposition reaction of CaCO3 at that temperature?
  
  CaCO_3(s) ⇌ CaO_(s) + CO_2(g)

• On analysis, an equilibrium mixture of the substances present at the given temperature was found to contain 0.20 mol of CO, 0.30 mol of water vapor, and 0.90 mol of H₂ in a liter.
  
  How many moles of CO₂ were there in the equilibrium mixture?