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Characteristics of Equilibrium Constant

Predict which...

Question

Predict which of the following reaction will have appreciable concentration of reactants and products:
a) $C l_{2} (g) \leftrightarrow 2 C l (g); K_{c} = 5 \times 10^{- 39}$
b) $C l_{2} (g) + 2 N O (g) \leftrightarrow 2 N O C l (g); K_{c} = 3.7 \times 10^{8}$
c) $C l_{2} (g) + 2 N O_{2} (g) \leftrightarrow 2 N O_{2} C l (g); K_{c} = 1.8$

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Solution

If the value of $K_{c}$ lies between $10^{- 3}$ and $10^{3}$ , a reaction has appreciable concentration of reactants and products. Thus, the reaction given in (c) will have appreciable concentration of reactants and products.

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Similar questions

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

a)

b)

c)

Q. Predict which of the following reaction will have appreciable concentration of reactants and products:
a)

{C l}_{2} (g) ⇌ 2 C l (g); K_{c} = 5 \times 10^{- 39}

{C l}_{2} (g) + 2 N O (g) ⇌ 2 N O C l (g); K_{c} = 3.7 \times 10^{8}

{C l}_{2} (g) + 2 {N O}_{2} (g) ⇌ 2 {N O}_{2} C l (g); K_{c} = 1.8

Q. For which of the following reactions the equilibrium mixture will contain an appreciable concentration of both reactants and products.
(a)

C l_{2} (g) ⇌ 2 C l (g); K_{c} = 6.4 \times 10^{39}

C l_{2} (g) + 2 N O (g) ⇌ 2 N O C l (g); K_{c} = 3.7 \times 10^{8}

C l_{2} (g) + 2 N O_{2} (g) ⇌ 2 N O_{2} C l (g); K_{c} = 1.8

Write the expression for the equilibrium constant, $K_{C}$ for each of the following reactions:

(i) $2 N O C l (g) \leftrightarrow 2 N O (g) + C l_{2} (g)$

(ii) $2 C u (N O_{3})_{2} (a q) \leftrightarrow 2 C u O (S) + 4 N O_{2} (g) + O_{2} (g)$

(iii) $C H_{3} C O O C_{2} H_{5} (a q) + H_{2} O (l) \leftrightarrow C H_{3} C O O H (a q) + C_{2} H_{5} O H (a q)$

(iv) $F e^{3 +} (a q) + 3 O H^{-} (a q) \leftrightarrow F e (O H)_{3} (s)$

(v) $I_{2} (s) + 5 F_{2} \leftrightarrow 2 I F_{5}$

What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0.78 M?
$2 I C l_{(g)} \leftrightarrow l_{2 (g)} + C l_{2 (g)}; K_{c} = 0.14$

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Characteristics of Equilibrium Constant

Standard XII Chemistry

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