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18 Nov 2019
Explain how the value of the pseudo-rate constant k (described in the introduction reaction shown in to the lab) can be calculated from a linear graph for a first-order shown in question 3. Calculate k' for the first-order plot shown in question 3. Consider a classic iodine clock reaction between iodide ions and persulfate ions. 2I^- (aq) + S_2O_8^2- (aq) rightarrow I_2 (aq) + 2SO_4^2- (aq) The following rate data was collected for different initial concentrations of iodide and persulfate ions. A. Compare trials 1 and 2: How did the concentration of iodide ions change in these two trials, and how did the rate change accordingly? What is the reaction order for iodide ions? B. Which two trials should be compared to determine the order of reaction with respect to persulfate ions? What is the reaction order for persulfate? Write the combined rate law for this version of an iodine clock reaction. Could the rate law have been predicted using the coefficients in the balanced chemical equation? Explain.
Explain how the value of the pseudo-rate constant k (described in the introduction reaction shown in to the lab) can be calculated from a linear graph for a first-order shown in question 3. Calculate k' for the first-order plot shown in question 3. Consider a classic iodine clock reaction between iodide ions and persulfate ions. 2I^- (aq) + S_2O_8^2- (aq) rightarrow I_2 (aq) + 2SO_4^2- (aq) The following rate data was collected for different initial concentrations of iodide and persulfate ions. A. Compare trials 1 and 2: How did the concentration of iodide ions change in these two trials, and how did the rate change accordingly? What is the reaction order for iodide ions? B. Which two trials should be compared to determine the order of reaction with respect to persulfate ions? What is the reaction order for persulfate? Write the combined rate law for this version of an iodine clock reaction. Could the rate law have been predicted using the coefficients in the balanced chemical equation? Explain.
Elin HesselLv2
6 May 2019