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MDCAT Chemistry QUESTION #4370
Question 1
Which of the following is a basic buffer?
  • $NH_4OH/NH_4Cl$✔️
  • $NaOH/NaCl$
  • $NaOH/HCl$
  • $H_2CO_3/NaHCO_3$
Correct Answer Explanation
A basic buffer resists pH changes in the basic range and is made of a weak base and its conjugate acid salt. $NH_4OH$ (weak base) and $NH_4Cl$ (its conjugate acid salt) form a basic buffer with $pH > 7$.