Question

question 3

which of the following is best characterized as a non-electrolyte?

\\(\text{h}_2\text{so}_4\\)
hydrofluoric acid
\\(\text{lioh}\\)
\\(\text{cacl}_2\\)
\\(\text{ch}_3\text{oh}\\) (methanol)

Explanation:

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<reasoning>

Classify each substance by its electrolyte strength

• \(\text{H}_2\text{SO}_4\) (sulfuric acid) is a strong acid, which dissociates completely in water to form ions. It is a strong electrolyte.
• Hydrofluoric acid (\(\text{HF}\)) is a weak acid, which partially dissociates in water to form some ions. It is a weak electrolyte.
• \(\text{LiOH}\) (lithium hydroxide) is a strong base, which dissociates completely in water. It is a strong electrolyte.
• \(\text{CaCl}_2\) (calcium chloride) is a soluble ionic salt, which dissociates completely into \(\text{Ca}^{2+}\) and \(\text{Cl}^-\) ions. It is a strong electrolyte.
• \(\text{CH}_3\text{OH}\) (methanol) is a molecular covalent compound that dissolves in water as intact molecules without producing ions. It is a non-electrolyte.

</reasoning>

<answer>
<mcq-option>(A) \(\text{H}_2\text{SO}_4\)</mcq-option>
<mcq-option>(B) Hydrofluoric acid</mcq-option>
<mcq-option>(C) \(\text{LiOH}\)</mcq-option>
<mcq-option>(D) \(\text{CaCl}_2\)</mcq-option>
<mcq-correct>(E) \(\text{CH}_3\text{OH}\) (methanol)</mcq-correct>
</answer>

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Answer:

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<reasoning>

Classify each substance by its electrolyte strength

• \(\text{H}_2\text{SO}_4\) (sulfuric acid) is a strong acid, which dissociates completely in water to form ions. It is a strong electrolyte.
• Hydrofluoric acid (\(\text{HF}\)) is a weak acid, which partially dissociates in water to form some ions. It is a weak electrolyte.
• \(\text{LiOH}\) (lithium hydroxide) is a strong base, which dissociates completely in water. It is a strong electrolyte.
• \(\text{CaCl}_2\) (calcium chloride) is a soluble ionic salt, which dissociates completely into \(\text{Ca}^{2+}\) and \(\text{Cl}^-\) ions. It is a strong electrolyte.
• \(\text{CH}_3\text{OH}\) (methanol) is a molecular covalent compound that dissolves in water as intact molecules without producing ions. It is a non-electrolyte.

</reasoning>

<answer>
<mcq-option>(A) \(\text{H}_2\text{SO}_4\)</mcq-option>
<mcq-option>(B) Hydrofluoric acid</mcq-option>
<mcq-option>(C) \(\text{LiOH}\)</mcq-option>
<mcq-option>(D) \(\text{CaCl}_2\)</mcq-option>
<mcq-correct>(E) \(\text{CH}_3\text{OH}\) (methanol)</mcq-correct>
</answer>

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