What is the formula of ammonium sulfite? Ammonium has the formula \textit {NH}_\textit4^+NH 4 + start text, N, H, end text, start subscript, start text, 4, end text, end subscript, start superscript, plus, end superscript, and sulfite has the formula \textit {SO}_\textit3^\textit{2-}SO 3 2- start text, S, O, end text, start subscript, start text, 3, end text, end subscript, start superscript, start text, 2, negative, end text, end superscript.

(NH₄)₂SO₃

Explanation:

We think in the salt: ammonium sulfite

Ammonium comes form the ammonia, a weak base

NH₃  +  H₂O  ⇄   NH₄⁺ +  OH⁻         Kb

Sulfite comes from the sulfurous acid

H₂SO₃ + H₂O ⇄ H⁺  + HSO₃⁻           Ka1

HSO₃⁻  +  H₂O ⇄ H⁺  + SO₃⁻²          Ka2

This is a dyprotic acid that, can release 2 protons. It makes the sulfite anion

SO₃⁻²  + 2NH₄⁺ → (NH₄)₂SO₃

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the answer would be b i believe