The Reaction Quotient Video Lessons

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Problem: Consider this equilibrium reaction at 400 K. Br2 (g) + Cl2 (g) ⇌ 2BrCl (g)        Kc = 7.0 If the composition of the reaction mixture at 400 K is [BrCl] = 0.00415 M, [Br2] = 0.00366 M, and [Cl2] = 0.000672 M, what is the reaction quotient, Q? How is the reaction quotient related to the equilibrium constant, Kc, for this reaction?            (i) Q < K            (ii) Q > K           (iii) Q = K

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Problem Details

Consider this equilibrium reaction at 400 K. 

Br2 (g) + Cl2 (g) ⇌ 2BrCl (g)        Kc = 7.0 

If the composition of the reaction mixture at 400 K is [BrCl] = 0.00415 M, [Br2] = 0.00366 M, and [Cl2] = 0.000672 M, what is the reaction quotient, Q? 

How is the reaction quotient related to the equilibrium constant, Kc, for this reaction? 

           (i) Q < K 

           (ii) Q > K

           (iii) Q = K

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