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08/10/2021 1:06 pm
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In a reaction A + B ⇌ C + D, the initial concentrations, of A and B were 0.9 mol. dm-3 each. At equilibrium, the concentration of D was found to be 0.6 mol dm-3. What is the value of equilibrium constant for the reaction
(a) 8
(b) 4
(c) 9
(d) 3
1 Answer
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08/10/2021 1:15 pm
Correct answer: (b) 4
Explanation:
A + B ⇌ C + D
Initial 0.9 0.9 0 0
At eqn. 0.3 0.3 0.6 0.6
Kc = \(\frac{0.6 \times 0.6}{0.3 \times 0.3}\)
= 4