Question
help with question 3
2. Would you have determined an identical rate law for the reaction al crystal violet and CH if you had used IOHIaf 0030M and 00NOM instead of the concentrations you did use in the 3. The rate law loe a certain reaction is second order with respect to one of reactants, R. Suppose you study this reaction, observing the absorbance of light at the analytical wavelength for R, and record the data with respect to elapsed time Also suppose that the concentrations of all the other reactants are in large excess, and that R is the only colored species involved. Explain which absorbance function. A, in A. or T/A, woul d yield A straight-mine graph when plotted against elapsed time Suppose that in the reaction R P, only the groduct, P. is colored. mixture as the reaction al What happens to heabsort nce at the anal wavelength for P of the (b) Suppose you do an experiment involving ihis reaction in which Q is present in large excess of R. first respect to R would the graph of ln A for p versus time be a order with
Explanation / Answer
(3). It is given that, the reaction is second order.
We know that the second order rate law is given as:
d[A] / dt = - k [A]2
d[A] / [A]2 = - k* dt
1/[A] = 1/[Ao] + kt
1/[A] = kt + 1/[Ao]
The above rate law equation is similar to the equation of a straight line y = mx + c.
where, slope is k straight line graph is plotted between 1/[A] and t.
Hence, 1/A would yield straight-line graph when plotted against elapsed time.
