10 Questions
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?
The addition of CH3COONa provides a source of CH3COO– ion, which reduces the % dissociation of the acid and makes the solution less acidic.
How does the addition of acetate ion affect the pH of the solution?
The addition of acetate ion increases the pH of the solution.
Adding CH3COONa to a solution of acetic acid decreases the concentration of H3O+ ions
True
The addition of CH3COONa to a solution of acetic acid increases the % dissociation of the acid
False
The equilibrium shifts to the right when CH3COONa is added to a solution of acetic acid
False
The pH of the acetic acid solution decreases as the concentration of added acetate ion increases
True
The % dissociation of acetic acid decreases as the concentration of added acetate ion increases
True
Test your knowledge of ionic equilibria in aqueous systems, including acid-base buffers, titration curves, and equilibria of slightly soluble ionic compounds.
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