Question

2l⁻ (aq) → I₂ (s) + 2e⁻
Formulate a cell for given electrode reaction.

Answer 1

Potassium persulfate K₂S₂O₈

Sodium iodide NaI

Sodium Thiosulfate Na₂S₂O₃ *

Tetrathionate ion S₄O₆²⁻ **

Variations in the rates of reactions will be mainly due to the differing molecular characteristics of the reactants.

There are many factors and three of these are concentration of the reactants, concentration of a catalyst and temperature at which the reaction occurs.