Why equilibrium favours weak acid or weak base

In summary, equilibrium refers to a state where the forward and reverse reactions of a chemical reaction occur at equal rates, resulting in no net change in reactant and product concentrations. Weak acids and bases tend to favor equilibrium because they have lower dissociation in solution, allowing for a more balanced equilibrium. The strength of an acid or base affects equilibrium by determining the degree of dissociation. Factors such as temperature, pressure, and concentration can influence the equilibrium of a weak acid or base. The pH of a solution is related to the equilibrium of a weak acid or base through the concentration of hydrogen ions.
  • #1
Titan97
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Homework Statement


IMG_20151011_101552_639.JPG


Which side does the equilibrium favour?

Homework Equations


Equilibrium favours weak acid or weak base (I don't know why :frown:)

The Attempt at a Solution


Using the given pka values, since the reactant is the weaker acid, reactants are favoured. (Backward reaction is favoured).
But why does equilibrium favour weak acid or weak base?
 
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  • #2
Try to express the K of the reaction using Ka values for both acids.
 
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  • #3
##k=10^{-0.6}##
 
  • #4
That's your answer, isn't it?
 
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  • #5
Yes.
 

What is the definition of equilibrium?

Equilibrium refers to a state in which the forward and reverse reactions of a chemical reaction occur at equal rates, resulting in no net change in the concentrations of reactants and products.

Why do weak acids and bases tend to favor equilibrium?

Weak acids and bases have less dissociation in solution compared to strong acids and bases. This means that a higher percentage of the weak acid or base remains in its molecular form, allowing for a more balanced equilibrium between the reactants and products.

How does the strength of an acid or base affect equilibrium?

The strength of an acid or base is determined by its ability to dissociate in solution. Strong acids and bases completely dissociate, leading to a more one-sided equilibrium favoring the products. Weak acids and bases have a lower degree of dissociation, resulting in a more balanced equilibrium.

What factors can influence the equilibrium between a weak acid or base?

The equilibrium between a weak acid or base can be influenced by factors such as temperature, pressure, and the concentration of reactants and products. Changes in these factors can shift the equilibrium towards either the reactants or products.

How does the pH of a solution relate to the equilibrium of a weak acid or base?

The pH of a solution is a measure of its acidity or basicity, which is determined by the concentration of hydrogen ions (H+) in the solution. In the case of a weak acid or base, the equilibrium between the dissociated and undissociated forms determines the concentration of H+ ions, thus affecting the pH of the solution.

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