Propose a mechanism that supports the rate law and this balanced equation.?

Question

I- S2O8(2-) --> I2 SO4 (2-)

rate law: rate = k [I-] [S2O8(2-)]

thank you

Answer 1

some thing is mess up;sorry

here:

http://www.chm.davidson.edu/chemistryapp...

they do work with:S2O82- (aq) + 3 I- (aq)  >2 SO42- (aq) + I3- (aq)

the order is 2(in respect with iodide),not 3 as from stoechiometric amount .

it think that:

A) I- + I- > -I-I- formation of a dianion diradical is the slow reaction

B) -I-I- + S2O82- react like a LEWIS ACID/BASE TO FORM

a really big molecule,with an electrical charge of 4-.

C)the LEWIS ADDUCT splits up (when the electrons rich

O-O bond)> I-I + SO4^2- + SO4^2-

because rqn A: rate = k [I-] [S2O8(2-)]