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IB Chemistry SL 3.1.3 Amphiprotic Species Questions

Use real SL exam questions to identify amphiprotic species and write equations for their acid and base behaviour.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Identify an amphiprotic species that can both donate and accept a proton.
  • Write two balanced equations showing the same species acting once as a Brønsted–Lowry acid and once as a base.
  • Use the proton-transfer products to distinguish amphiprotic behaviour from a species that can only donate or accept a proton.

Learn this topic

Study 3.1.3—Amphiprotic species conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry SL 3.1.3 Amphiprotic Species Questions question 1

[Maximum number: 1]

Soluble acids and bases ionize in water.

Sodium hypochlorite ionizes in water.

OCl−(aq)+H2O(l)⇌OH−(aq)+HOCl(aq)\mathrm{OCl}^{-}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightleftharpoons \mathrm{OH}^{-}(\mathrm{aq})+\mathrm{HOCl}(\mathrm{aq})

Identify the amphiprotic species.

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