What is the conjugate acid of the amphoteric bicarbonate ion ()?

Answer and explanation

Correct answer: A.

  1. Step 1: A conjugate acid is formed when a Brønsted-Lowry base accepts a proton ().
  2. Step 2: Adding to produces carbonic acid: .
Answer
.
Why not the others: '' is the conjugate base formed when bicarbonate donates a proton; '' is the dehydrated gaseous anhydride; '' is hydroxide.

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