Change of Concentration with Time (Section)
Consider the data presented in Exercise. (a) By using appropriate graphs, determine whether the reaction is first order or second order. (b) What is the rate constant for the reaction? (c) What is the half-life for the reaction?
Reaction Rates (Sections)
Consider the following hypothetical aqueous reaction: A(aq)→ B(aq). A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The following data are collected:
Time (min) | 0 | 10 | 20 | 30 | 40 |
Moles of A | 0.065 | 0.051 | 0.042 | 0.036 | 0.031 |
(a) Calculate the number of moles of B at each time in the table, assuming that there are no molecules of B at time zero, and that A cleanly converts to B with no intermediates. (b) Calculate the average rate of disappearance of A for each 10-min interval in units of M/s. (c) Between t = 10 min and t = 30 min, what is the average rate of appearance of B in units of M/s? Assume that the volume of the solution is constant.
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