Question

What is the redox reaction between these three equations:

1. NaOCl + 2HCl --> NaCl + H2O + Cl2

2. Cl2 + 2I- --> I2 + 2Cl-

3. 2S2O3^2- + I2 --> S4O6^2- + 2I-

Answer 1

answer : two redox reaction are here

   Cl2 + 2I- --> I2 + 2Cl-

                    2S2O3^2- + I2 --> S4O6^2- + 2I-

explanation:

reason: Cl2 ----------------> Cl-

Cl oxidation state changes from 0 to -1 . so it is reduction

I- -----------------> I2

here I oxidation state changes from -1 to 0 . so it is oxidation .

both oxidation and reduction reaction takes place .it is redox reaction

2S2O3^2- + I2 --> S4O6^2- + 2I-   . this is also redox reaction . because

          S oxidation state changes from 2.0 to 2.5 it is oxidation

          I oxidation state changes from 0 to -1 .it is reduction .so it is also redox reaction

but in the queston