MDCAT Chemistry MCQ #2254

A laboratory technician needs to prepare a buffer solution to maintain a pH of approximately 4.7. Which pair of chemicals should be selected?

MDCAT Chemistry MCQ #2254

  1. Question 1

    Q1. A laboratory technician needs to prepare a buffer solution to maintain a pH of approximately 4.7. Which pair of chemicals should be selected?

    • A) HCl and NaCl
    • B) NaOH and NaCH3COO
    • C) CH3COOH and CH3COONa
    • D) NH4OH and NH4Cl

    Answer: CH3COOH and CH3COONa

    Explanation: An acidic buffer consists of a weak acid and its salt with a strong base. Option A is a strong acid/salt mix.