Which of the following solutions can function as a buffer? A) a solution containing HCl and NaCl B) a solution containing NaOH and NaCl C) a solution containing NH₃ and NH₄Cl D) none of these

Question

Quizplus · Accepted Answer

A buffer solution consists of a weak acid and its conjugate base or a weak base and its conjugate acid. Choice C, represented with Unicode characters for subscript and superscript (intended to represent NH4+ and NH4Cl), suggests a solution of ammonium ions (NH4+) and ammonium chloride (NH4Cl), which is a weak acid (NH4+) and its conjugate base (Cl-), making it capable of functioning as a buffer. Choices A and B involve strong acids or bases with their salts, which do not form buffer systems.

Which of the Following Solutions Can Function as a Buffer