Question

Write a balance reduction half -reaction similar to C/2+2e- for each of the follwoing non metals. I2, N2, S8

Answer 1

Answer – We are given the balanced half -reaction of Cl₂ + 2e^- -----> 2Cl^- and we need to write the balanced half -reaction of N₂, I₂ and S₈

We know there are two type of half-reaction first one is oxidation half -reaction and second one is reduction half -reaction. The above given one is reduction half -reaction, since when electrons gain then it is reduction process.

So the balanced half -reaction of N₂, I₂ and S₈ as follow –

N₂ + 6e^- -----> 2N^3-

N has 3- charge, so we need 6e^- for 2 N.

I₂ + 2e^- -----> 2I^-

For iodine there is -1 charge, so for 2 I we need 2e^-

S₈ + 16e^- -----> 8S^2-

For S there is 2- charge, so we need 2 electrons for 1 S and 16 for 8 S.