Abuffer contains significant amounts of acetic acid and sodium acetate. part a write an equation showing how this buffer neutralizes added acid (hno3).

If a strong acid is added to a buffer, the conjugate base of buffer will reacts with the H⁺ from the strong acid to form the weak acid. The H⁺ gets absorbed by the CH₃COO⁻ instead of reacting with water to form H₃O⁺ so the pH will remain constant, The equation is:
CH₃COO⁻ + HNO₃ → CH₃COOH + NO₃⁻
                     S.A               W.A
Buffer converts strong acid to weak acid

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Your question is not clear but if you can explain yourself i would be glad to .  just trying to : ))