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Select the species which can act as an a...

Select the species which can act as an acid and as base:

A

`SO_(4)^(2-)`

B

`Cl^(-)`

C

`H_(3)O^(+)`

D

`HSO_(4)^(-)`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question of identifying a species that can act as both an acid and a base, we can follow these steps: ### Step 1: Understand the Definitions - **Acid**: A substance that can donate a proton (H⁺). - **Base**: A substance that can accept a proton (H⁺). ### Step 2: Analyze Each Species - **SO₄²⁻ (Sulfate Ion)**: - Can accept protons to form HSO₄⁻ but cannot donate protons. - **Conclusion**: Cannot act as both an acid and a base. - **Cl⁻ (Chloride Ion)**: - Can accept protons to form HCl but cannot donate protons. - **Conclusion**: Cannot act as both an acid and a base. - **H₃O⁺ (Hydronium Ion)**: - Can donate protons to form H₂O but cannot accept protons. - **Conclusion**: Cannot act as both an acid and a base. - **HSO₄⁻ (Hydrogen Sulfate Ion)**: - Can accept a proton to form H₂SO₄ (acting as a base). - Can donate a proton to form SO₄²⁻ (acting as an acid). - **Conclusion**: Can act as both an acid and a base. ### Step 3: Final Conclusion Based on the analysis, the only species that can act as both an acid and a base is **HSO₄⁻**. ### Answer The species that can act as both an acid and a base is **HSO₄⁻**. ---
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