The reaction 2 a → b c has a kc of 0.2. the reaction is commenced with initial concentrations [a] = 0.2 m, [b] = 0.2 m and [c] = 0.2 m. in what direction does the reaction occur?

Question

Chemistry

Derek Barron

18 February, 15:02

The reaction 2 a → b c has a kc of 0.2. the reaction is commenced with initial concentrations [a] = 0.2 m, [b] = 0.2 m and [c] = 0.2 m. in what direction does the reaction occur?

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Natalie Castro · Answer 1

Kc = [b]*[c] / ([a]^2) = (0.2 M) ^2 / (0.2 M) ^2 = 1.0

To achieve equilibrium, Kc must be equal to 0.2, therefore Kc must decrease, so the concentrations of b and c must decrease and the concentration of a must increase, meaning the reaction will proceed toward the formation of a.