Write equilibrium constant (kc ) for the reaction a + b ⇌ c + d
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a + b = c + d
Kc = Kf/Kb
Forward reaction :
aA + bB = cC + dD
Rf = Kf (A) a. (B) b
Back word reaction :
Rb = Kb (C) c. (D) d
We know that
Rf = Rb
Kf (A) a. (B) b = Kb (C) c. (D) d
Kf/Kb = (C) c. (D) d/(A) a. (B) b
So,
Kc = (C) c. (D) d/ (A) a. (B) b == Product /Reactant
Kc = Kf/Kb
Forward reaction :
aA + bB = cC + dD
Rf = Kf (A) a. (B) b
Back word reaction :
Rb = Kb (C) c. (D) d
We know that
Rf = Rb
Kf (A) a. (B) b = Kb (C) c. (D) d
Kf/Kb = (C) c. (D) d/(A) a. (B) b
So,
Kc = (C) c. (D) d/ (A) a. (B) b == Product /Reactant
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