Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO3 and HI are mixed. Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO3 and HI are mixed. 2 H (aq) SO32 - (aq) → H2O (l) SO2 (g) 2 H (aq) SO32 - (aq) Mg2 (aq) 2 I - (aq) → H2SO3 (s) MgI2 (aq) 2 H (aq) SO32 - (aq) → H2SO3 (s) Mg2 (aq) 2 I - (aq) → MgI2 (s) No reaction occurs.

Mg²⁺ (aq) + SO₃²⁻ (aq) + 2 H⁺ (aq) + 2 I⁻ (aq) ⇄ Mg²⁺ (aq) + 2I⁻ (aq) + H₂O (l) + SO₂ (g)

Explanation:

Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO₃ and HI are mixed.

When MgSO₃ reacts with HI they experience a double displacement reaction, in which the cations and anions of each compound are exchanged, forming H₂SO₃ and MgI₂. At the same time, H₂SO₃ tends to decompose to H₂O and SO₂. The complete molecular equation is:

MgSO₃ (aq) + 2 HI (aq) ⇄ MgI₂ (aq) + H₂O (l) + SO₂ (g)

In the complete ionic equation, species with ionic bonds dissociate into ions.

Mg²⁺ (aq) + SO₃²⁻ (aq) + 2 H⁺ (aq) + 2 I⁻ (aq) ⇄ Mg²⁺ (aq) + 2I⁻ (aq) + H₂O (l) + SO₂ (g)