#85 Write down the equilibrium constant expression

Write down the equilibrium constant expression - Inorganic Chemistry

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Free Chegg Question

1) Write down the equilibrium constant expression for the following reaction
Fe³⁺_(aq) + SCN^- _(aq) +- FeSCN²⁺_(aq)
Equilibrium is established in the reversible reaction 2A _(aq) + B _(aq) <---> 2C _(aq). The equilibrium concentrations are given in the following table. Calculate these expressions,

a) Which of the combinations of concentrations (expression), gives the most constant numerical value? Is this form known as the equilibrium constant expression?
b) Briefly explain why equilibrium constant expression does not contain concentration terms for RUIS solids of pure liquids phases?
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Free Chegg Answer

Given that, an equilibrium reaction is
Fe³⁺ (aq) + SCN^- (aq)  FeSCN^2- (aq).
We have to write the equilibrium constant expression.
We know that the equilibrium constant is the ratio of the concentration of the substance on the product side to the concentration of the substance on the reactant side.
So, the required expression of the equilibrium constant is
K_eq = [FeSCN^2- (aq)]/[Fe³⁺ (aq)].[SCN^- (aq)].
This is the required expression of the equilibrium constant.