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Predict Which of the Following Reaction Will Have the Appreciable Concentration of Reactants and Products: - Chemistry

Predict which of the following reaction will have the appreciable concentration of reactants and products:

a) Cl2 (g) ⇌ 2Cl (g) Kc = 5 ×10–39

b) Cl2 (g) + 2NO (g) ⇌ 2NOCl (g) Kc = 3.7 × 108

c) Cl2 (g) + 2NO2 (g) ⇌ 2NO2Cl (g) Kc = 1.8

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Solution 1

Following conclusions can be drawn from the values of Kc .

(a) Since the value of Kc is very small, this means that the molar concentration of the products is very small as compared to that of the reactants.

(b) Since the value of Kc is quite large, this means that the molar concentration of the products is very large as compared to that of the reactants

(c) Since the value of Kc is 1.8, this means that both the products and reactants have appreciable concentration.

Solution 2

If the value of Klies between 10–3 and 103, a reaction has the appreciable concentration of reactants and products. Thus, the reaction given in (c) will have appreciable concentration of reactants and products.

Concept: Law of Chemical Equilibrium and Equilibrium Constant
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APPEARS IN

NCERT Class 11 Chemistry Textbook
Chapter 7 Equilibrium
Q 32 | Page 228
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