And here is the table you need. Dependence of Reaction Rate on Concentration Rea
ID: 488974 • Letter: A
Question
And here is the table you need.
Dependence of Reaction Rate on Concentration Reaction: 6 I^- (aq) + BrO_3^- (aq) 6 H^+ (aq) rightarrow 3 I_2 (aq) + 3 H_2 O rate k(I^-)^(BrO_3^-) (H^+)" = Delta (BrO_3^-0/t In all the reaction mixtures used in this experiment, the color change occurred when a constant predetermined number of moles of BrO_3^- had been used up by the reaction. The color "clock" allows you to measure the time required for this fixed number of moles of BrO_3^- to react. The rate of each reaction is determined by the time r required for the color to change; since in Equation 2 the change in concentration of BiO_3^- ion, A(BrO_3^-), is the same in each mixture, the relative rate of each reaction is inversely proportional to the time t. Since we are mainly concerned with relative rather than absolute rate, we will for convenience take all relative rates as being equal to 1000/t. Fill in the following table, first calculating the relative reaction rate for each mixture. The reactant concentrations in the reaction mixture are not those of the stock solutions, since the reagents were diluted by the other solutions. The final volume of the reaction mixture is 50 mL in all cases. Since the number of moles of reactant does not change on dilution we can say, for example, for I^- ion, that no mole I^- (I^-)_stock times V_stock = (I^-)_mixture times V_mixture For Reaction Mixture 1, (I^-)_stock = 0.010 M, V_stock = 10 mL, V_mixture = 50 mL Therefore, (I^-0_mixture = 09.010 M times mL/50 mL = 0.0020 M Calculate the rest of the concentrations in the table using the same approach. Experimental Procedure A. Dependence of Reaction Rate on Concentration In Table 21.1 we have summarized the reagent volumes to be used in carrying out the several reactions whose rates we need to know to find the general rate law for Reaction I. First, measure out 100 mL of each of the listed reagents (except H, 0) into clean, labeled flasks or beakers. Use these reagents in your reaction mixtures.Explanation / Answer
reaction mix. relative rate of reaction (1000/t) reactant conc. in reacting mixture
(I-) (BrO-3) (H+)
1 6.33 0 .0020 .008 .02
2 13.51 0.004 .008 .02
3 13.89 0 .0020 .016 .02
4 24.39 0 .0020 .008 .04
5 4.59 .0016 .004 .03