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Unformatted text preview: will be the time the reaction took to occur. b) A sudden color change occurs because the first reaction takes place with no color change then the other reaction occurs that has a color change. c) The concentration of S 2 O 3 2-divided by the time for the color change to occur will show the rate at which I 2 is produced. 3. This is to see if the addition of CuSO 4 or Fe(NO 3 ) 3 will act as a catalyst in the reaction already done in part B. 4. .40 M I-, .10 M S 2 O 8 , .0050 M S 2 O 8 . Rate for B2 is .0063 M/s. Rate for B7 is 6.76 x 10-5 M/s....
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- Spring '06