Question

question 2

which of the following is best defined as a weak acid?

\\(\text{hno}_3\text{ (aq)}\\)
hydrochloric acid
\\(\text{hbr (aq)}\\)
hypochlorous acid
\\(\text{hclo}_4\text{ (aq)}\\)

Explanation:

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<reasoning>

Identify strong acids

The common strong acids are \(\text{HCl}\), \(\text{HBr}\), \(\text{HI}\), \(\text{HNO}_3\), \(\text{HClO}_4\), \(\text{HClO}_3\), and \(\text{H}_2\text{SO}_4\).
From the options:

• \(\text{HNO}_3\text{ (aq)}\) (Nitric acid) is a strong acid.
• Hydrochloric acid (\(\text{HCl}\)) is a strong acid.
• \(\text{HBr (aq)}\) (Hydrobromic acid) is a strong acid.
• \(\text{HClO}_4\text{ (aq)}\) (Perchloric acid) is a strong acid.

Identify the weak acid

Hypochlorous acid (\(\text{HClO}\)) is not on the list of common strong acids. It only partially dissociates in aqueous solution, which is the definition of a weak acid.
</reasoning>

<answer>
<mcq-option>\(HNO_3\) (aq)</mcq-option>
<mcq-option>Hydrochloric acid</mcq-option>
<mcq-option>HBr (aq)</mcq-option>
<mcq-correct>Hypochlorous acid</mcq-correct>
<mcq-option>\(HClO_4\) (aq)</mcq-option>
</answer>

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Answer:

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<reasoning>

Identify strong acids

The common strong acids are \(\text{HCl}\), \(\text{HBr}\), \(\text{HI}\), \(\text{HNO}_3\), \(\text{HClO}_4\), \(\text{HClO}_3\), and \(\text{H}_2\text{SO}_4\).
From the options:

• \(\text{HNO}_3\text{ (aq)}\) (Nitric acid) is a strong acid.
• Hydrochloric acid (\(\text{HCl}\)) is a strong acid.
• \(\text{HBr (aq)}\) (Hydrobromic acid) is a strong acid.
• \(\text{HClO}_4\text{ (aq)}\) (Perchloric acid) is a strong acid.

Identify the weak acid

Hypochlorous acid (\(\text{HClO}\)) is not on the list of common strong acids. It only partially dissociates in aqueous solution, which is the definition of a weak acid.
</reasoning>

<answer>
<mcq-option>\(HNO_3\) (aq)</mcq-option>
<mcq-option>Hydrochloric acid</mcq-option>
<mcq-option>HBr (aq)</mcq-option>
<mcq-correct>Hypochlorous acid</mcq-correct>
<mcq-option>\(HClO_4\) (aq)</mcq-option>
</answer>

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