Chlorine dioxide, 2, is a reddish-yellow gas that is soluble in water. In basic solution it gives 3 and 2 ions. 22 +2 3 +2 +2 To obtain the rate law for this reaction, the following experiments were run and, for each, the initial rate of reaction of 2 was determined. Determine the overall reaction order, the rate law and the value of the rate constant. You must show all the calculations to support your answer.

1 Initial Concentration ( ) Initial Rate () 2 Exp 1 0.060 0.030 0.0248 Exp 2 0.020 0.030 0.00276 Exp. 3 0.020 0.090 0.00828