Use the data in Appendix 11 to rationalize the following observations in a quantitative manner. What assumption(s)

Question:

Use the data in Appendix 11 to rationalize the following observations in a quantitative manner. What assumption(s) have you made in answering this question?

(a) The dithionate ion, [S₂O₆]²⁻, can be prepared by controlled oxidation of [SO₃]²⁻ using MnO₂.

(b) In the presence of acid, KI and KIO₃ react to form I₂.

Data from Appendix 11

The concentration of each aqueous solution is 1 mol dm⁻³ and the pressure of a gaseous component is 1 bar (10⁵ Pa). (Changing the standard pressure to 1 atm (101 300 Pa) makes no difference to the values of E^o at this level of accuracy.) Each half-cell listed contains the specified solution species at a concentration of 1 mol dm⁻³; where the half-cell contains [OH]⁻, the value of E^o refers to [OH⁻] = 1 mol dm⁻³, hence the notation E^o_{[OH⁻] = 1}