[Passing]

Hi there, I need both the reduction and oxidation equations for the following reactions:

1. MnSO₄(aq) + Br₂(aq) + NaOH(diluted) + CuSO₄(aq). I know that Mn gets oxidised to MnO₂ and CuSO₄ acts as a catalyst, so I guess it doesn't change.

2. MnSO₄ + Na₂CO₃ + NaNO₃ + dT(heated)
I know it is: Mn²⁺ + 2NO₃^- + 2CO₃^- <---> MnO₄^2- + 2NO₂^- + 2CO₂ but I have problems of making the reduction and oxidation equation.

3. H₂SO₃ + Lugol's Iodine (I₅^- or I₂KI?). I know that sulfate is formed. I'm kinda stuck here, because of: I₂KI   K⁺I₃^-

4. Na₂SO₃(aq) + S + dT. I know that S₂O₃^2- is formed.

[onn]

Hi there, I need both the reduction and oxidation equations for the following reactions:

1. MnSO₄(aq) + Br₂(aq) + NaOH(diluted) + CuSO₄(aq). I know that Mn gets oxidised to MnO₂ and CuSO₄ acts as a catalyst, so I guess it doesn't change.

2. MnSO₄ + Na₂CO₃ + NaNO₃ + dT(heated)
I know it is: Mn²⁺ + 2NO₃^- + 2CO₃^- <---> MnO₄^2- + 2NO₂^- + 2CO₂ but I have problems of making the reduction and oxidation equation.

3. H₂SO₃ + Lugol's Iodine (I₅^- or I₂KI?). I know that sulfate is formed. I'm kinda stuck here, because of: I₂KI   K⁺I₃^-

4. Na₂SO₃(aq) + S + dT. I know that S₂O₃^2- is formed.

Have a look in your data book, simply identify the starting and final oxidation state, and do half equations. they should be balanced in terms of atoms and charges