Question

1. Balance the following reaction in acidic solution. I-(aq) + MnO4-(aq)  Mn2+(aq) + I2(s)

2. Write a balanced net ionic equation for the following reaction in basic solution using both methods for balancing a redox reaction:

     Zn(s)  +  NO₃^-(aq)  à  NH₃ (aq)  +  Zn(OH)₄^2- (aq)

3. Write a balanced net ionic equation for the following reaction in basic solution using both methods for balancing a redox reaction:

        MnO₄^-(aq)  + C₂H₅OH(aq) à Mn²⁺(aq) + HC₂H₃O₂ (aq)

Answer 1

I lag + Write Mno,caqs down the Mint (aq) + I (S) Half cell Reactione I ( aq ) - I (ی , . I atom both sides by multiplying by 2 on Balance left side ? I 199) - Ins) Adding 20 on right side to balance charges 2 I caq - Izcs) + z ł - 1) . Mno, lag Mn²t Balancing oxygen atoms by adding 44₂0 right side - Mno, caq - Mm² + 4HO Adding 84t left side to make No of protone equal Mng lag + 8ht caqs - Mnet + 4H2O Adding sé on left side to balance charge Mno (aq) + 8H caqi +50 Mg ²+ + 4H₂O 2 ) I Multiplying to make | And then equation ist by 5 and equation and by a No of electrons lost / gained equal to each othe add both equations. Tlo tamno caq) + 164t (aq- 5 I (s) + 2mn²+ + 2H₂O