Conjugate Acid-base Pairs
The conjugate base of H₂PO₄⁻ is:
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About This Question
- Subject
- chemistry
- Chapter
- equilibrium
- Topic
- conjugate acid-base pairs
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
HPO₄²⁻
According to the Bronsted-Lowry Theory:
- A Conjugate Base is the species remaining after an acid has donated a proton (H+).
- Given species: H2PO4− Reaction: H2PO4−→H++HPO42−
- By removing one proton, the charge decreases by 1 (from −1 to −2).
- Therefore, HPO42− is the conjugate base.
This easy difficulty chemistry question is from the chapter equilibrium, covering the topic of conjugate acid-base pairs. It appeared in the 2025 exam.
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