1 mole of H2O and CO are taken in a 10 liter container at equilibrium point 40% of H2O reacts with CO to form H2O & CO2 Calculate the equilibrium constant for the reaction.
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Solution
[H2O] = [CO] = 1 mol/10 L = 0.1M 40 % of 1mole = 1 mole x 40/100 = 0.40 mole molarity = moles /volume = 0.40 mol /10 L = 0.040 M
H2O
CO
H2
CO2
Initial
0.1
0.1
0
0
Change
0.04
0.04
0.04
0.04
equilibrium
0.06
0.06
0.04
0.04
Kc = [H2][CO2]/[[H2O][CO] = 0.04 x 0.04 / 0.06 x 0.06 =0.0016/0.0036 = 0.44