Chemistry - Chemical Equilibrium Question with Solution | TestHub
ChemistryChemical EquilibriumProblems involving more than one equilibriumHard2 minQB
ChemistryHardsingle choice
An amount of 1 mole each of A and D is introduced in 1 L container. Simultaneously the following two equilibria are established:
A ⇌ B + C; Kc = 104 M and
B + D ⇌ A; Kc = 10-4 M-1
The equilibrium concentration of A will be
Options:
Answer:
D
Solution:
Let extents be x (first) and y (second): [A] = 1 - x + y, [B] = x - y, [C] = x, [D] = 1 - y K1K2 = [C]/[D] = 1 gives [C] = [D], so x + y = 1
Then [A] = 2y, [B] = 1 - 2y ≈ 1, [D] ≈ 1
K2 = [A]/([B][D]) = 2y = 10-4 gives [A] = 10-4 M
This is option (d).
Stream:JEESubject:ChemistryTopic:Chemical EquilibriumSubtopic:Problems involving more than one equilibrium
⏱ 2mℹ️ Source: QB
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