Question

Balance by half reaction. Mno⁴⁻ + SO². gives Mn² + HSO⁴⁻ in acidic medium

Answer 1

To balance the given equation Mno⁴⁻ + SO² gives Mn² + HSO⁴⁻ in acidic medium, you need to follow the steps of the half-reaction method. Using these steps, the balanced equation is
`MnO_4^(-) (aq) + SO_2 (g) + 2H^+ (aq) → Mn^(2+) (aq) + HSO_4^(-) (aq).`

Step-by-step explanation:

To balance the given equation in acidic medium, we need to follow the steps of the half-reaction method:

1. Balance the atoms other than H and O.
2. Balance the O atoms by adding
   `H_2O` molecules.
3. Balance the H atoms by adding H+ ions.
4. Balance the charges by adding electrons (e-).
5. Ensure that the number of electrons transferred in each half-reaction is the same.
6. Add the two half-reactions together and cancel out any common terms.
7. Check that both mass and charge are balanced.

Using these steps, the balanced equation for the given reaction in acidic medium is:

`MnO_4^(-) (aq) + SO_2 (g) + 2H^+ (aq) → Mn^(2+) (aq) + HSO_4^(-) (aq).`