The rate of a chemical reaction can be measured as the rate of appearance of any

Question

The rate of a chemical reaction can be measured as the rate of appearance of any of the products or as the rate of disappearance of an of the reactants. These relative rates of reaction are related through the stoichiometry of the overall reaction For example, the rate of the reaction shown below can be determined by measuring the initial rate of disappearance of I, -A[I 1/At CIO3 (aq) 9(a) 6 H+ (aq) 31 3 (ag)C(a3H20 If the initial rate of disappearance of I under a given set of experimental conditions is 43.6 x 10-3 M/s then what is the rate of disappearance of CIO3 under those same experimental conditions? Enter your answer with units. 29.1E-3 M/s The relative rates for the disappearance of reactants and products is determined by the stoichiometry of the reaction. The relative rates would be given by: If ?[C]/dt. 0.5 M/s, then 0.5 M/s -1/3 A[B]/At B will disappear at three times the rate that C appears, as indicated by the stoichiometry Submit Answer Incorrect. Tries 5/45 Previous Tries

Explanation / Answer

rate of reaction = -rate of disappearance ClO3- = -1/9 rate of disappearance of I-

hence rate of disappearance of  ClO3- = (43.6 x 10-3)/9 = 4.84 x 10-3 M/s

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