QuestionDecember 15, 2025

Which of the following when mixed at equimolar concentrations, will result in the formation of a buffer solution? HCl and NaOH HClO and NaOH HClO_(2) and NaClO_(2) HNO_(3) and NaNO_(3)

Which of the following when mixed at equimolar concentrations, will result in the formation of a buffer solution? HCl and NaOH HClO and NaOH HClO_(2) and NaClO_(2) HNO_(3) and NaNO_(3)
Which of the following when mixed at equimolar concentrations, will result in the
formation of a buffer solution?
HCl and NaOH
HClO and NaOH
HClO_(2) and NaClO_(2)
HNO_(3) and NaNO_(3)

Solution
4.4(299 votes)

Answer

HClO and NaOH; HClO_2 and NaClO_2} Explanation 1. Identify buffer solution criteria A buffer forms from a weak acid and its conjugate base (or vice versa) in comparable amounts. 2. Analyze each pair HCl and NaOH: Strong acid + strong base, no buffer. HClO and NaOH: Weak acid (HClO) + strong base (NaOH) → forms ClO^- (conjugate base); buffer forms. HClO_2 and NaClO_2: Weak acid and its salt; buffer forms. HNO_3 and NaNO_3: Strong acid and its salt; no buffer.

Explanation

1. Identify buffer solution criteria<br /> A buffer forms from a weak acid and its conjugate base (or vice versa) in comparable amounts.<br />2. Analyze each pair<br /> HCl and NaOH: Strong acid + strong base, no buffer.<br /> HClO and NaOH: Weak acid (HClO) + strong base (NaOH) → forms ClO$^-$ (conjugate base); buffer forms.<br /> $HClO_2$ and $NaClO_2$: Weak acid and its salt; buffer forms.<br /> $HNO_3$ and $NaNO_3$: Strong acid and its salt; no buffer.
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