The gas phase reaction between hydrogen and iodine is proposed to occur as follows: step 1 fast: 12 =21 step 2 slow. H2 +212 HI (1) What is the equation for the overall reaction? Use the smallest integer coefficients possible. If a box is not needed, leave it blank. + + (2) Which species acts as a catalyst? Enter formula. If none, leave box blank: (3) Which species acts as a reaction intermediate? Enter formula. If none, leave box blank: (4) Complete the rate law for the overall reaction that is consistent with this mechanism. Use the form k[A][B]", where '1' is understood (so don't write it if it's a '1') for m, n etc. Rate =