Write the equilibrium expression, Kc , for each of the following reactions.Ag2CrO4(s) ⇌ 2 Ag+(aq) + CrO42- (aq)2 NO(g) + O2(g) ⇌ 2 NO2(g)HCN(aq) + OH-(aq) ⇌ CN- (aq) + H2O(l)

Answered: Write the equilibrium expression, Kc ,…

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 12.66PAE

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Question

Write the equilibrium expression, K_c , for each of the following reactions.

Ag₂CrO₄(s) ⇌ 2 Ag+(aq) + CrO_4^2-(aq)
2 NO(g) + O₂(g) ⇌ 2 NO₂(g)
HCN(aq) + OH^-(aq) ⇌ CN^- (aq) + H₂O(l)

Expert Solution

Step 1 equilibrium expression

Since we know that equilibrium expression is written as

K_c = concentration of products / concentration of reactants

I.e K_c = [products]ⁿ /[Reactants]^m where n and m are the coefficients of products and reactants respectively.

Note : Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction.

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