[Chem] Buffer solution with acetic acid

[hiuting]

Homework Statement

100mL of 0.10M HNO₃ was added to a 100mL mixture containing 0.30M acetic acid and 0.10M sodium acetate.
Ka = 1.8 x 10-⁵

Homework Equations

CH₃COOH $$\rightarrow$$ H⁺ + CH₃COO^-
CH₃COONa $$\rightarrow$$ Na⁺ + CH₃COO^-


CH₃COO^- + H⁺ $$\rightarrow$$ CH₃COOH

The Attempt at a Solution

CH₃COO^- + H⁺ $$\rightarrow$$ CH₃COOH
I used the ICE table for this
and it turns out that the molarity of CH₃COO^- and H⁺ are both = 0 at equilibrium...

 

[Borek]

Which suggests you have now solution of acetic acid and sodium nitrate... Take a look at stoichiometry of the mixture.

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