Question

question
if we add acid to a buffer containing nach₃ch₂coo and ch₃ch₂cooh, the acid will react with which of the following?
select the correct answer below:
○ nach₃ch₂coo
○ ch₃ch₂cooh
○ na+
○ no reaction will occur.

Explanation:

Step1: Buffer solution composition

A buffer solution consists of a weak acid (CH₃CH₂COOH) and its conjugate base (CH₃CH₂COO⁻ from NaCH₃CH₂COO).

Step2: Reaction with added acid

When an acid (H⁺) is added, it reacts with the conjugate base. The reaction is \(H^{+}+CH_{3}CH_{2}COO^{-}
ightleftharpoons CH_{3}CH_{2}COOH\). So the acid (H⁺) reacts with \(CH_{3}CH_{2}COO^{-}\) (from NaCH₃CH₂COO).

Answer:

NaCH₃CH₂COO