Question

Explain why, in gas phase the order of reactivity of halide ions is in the order.
F->Cl->Br->I-
While in methanol (protic solvent), the order of reactivity is?

Answer 1

The molar mass of potassium permanganate is 158 g/mol. To find the equivalent mass, divide that molar mass by the mols of electrons taken in its half reaction. That would be five. 158/5 = 31.6 grams/equivalent.

F>Cl>I>Br is the radio active order.