Ionic Equilibria in Aqueous Systems Quiz
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Questions and Answers

How does a buffer work through the common-ion effect?

A buffer works through the common-ion effect by shifting the equilibrium to reduce the concentration of H3O+ ions, making the solution less acidic.

What is the effect of added acetate ion on the dissociation of acetic acid?

The added acetate ion reduces the % dissociation of acetic acid, making the solution less acidic and increasing the pH.

How is the % dissociation of acetic acid calculated?

The % dissociation of acetic acid is calculated as the % dissociation = (% dissociation * CH3COOH dissociation) / CH3COOH initial concentration * 100.

What impact does the addition of CH3COONa have on the dissociation of acetic acid?

<p>The addition of CH3COONa provides a source of CH3COO– ion, which reduces the % dissociation of the acid and makes the solution less acidic.</p> Signup and view all the answers

How does the addition of acetate ion affect the pH of the solution?

<p>The addition of acetate ion increases the pH of the solution.</p> Signup and view all the answers

Adding CH3COONa to a solution of acetic acid decreases the concentration of H3O+ ions

<p>True</p> Signup and view all the answers

The addition of CH3COONa to a solution of acetic acid increases the % dissociation of the acid

<p>False</p> Signup and view all the answers

The equilibrium shifts to the right when CH3COONa is added to a solution of acetic acid

<p>False</p> Signup and view all the answers

The pH of the acetic acid solution decreases as the concentration of added acetate ion increases

<p>True</p> Signup and view all the answers

The % dissociation of acetic acid decreases as the concentration of added acetate ion increases

<p>True</p> Signup and view all the answers

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