For the hypothetical reaction: aA bB -9 xX yy, where c is a catalyst, the data b
ID: 490576 • Letter: F
Question
For the hypothetical reaction: aA bB -9 xX yy, where c is a catalyst, the data below was collected Note that a catalyst can be part of the rate law if it is not zeroth order. Initial Rate [Alo [B] o L. min 2.5. 10-4 0.15 0.15 0.0010 1.0 10-3 0.0010 0.30 0.15 2.5. 10-4 0.15 0.0010 0.30 5.0 10-4 0.15 0.15 0,0020 What is the reaction order for each reactant and the catalyst? (Show your work in determining the order of each). calculate the average rate constant for this reaction. Show the units and use the correct number of significant figures.Explanation / Answer
writing rate law for given reaction
r = k [A]a [B]b [C]c
from the given values trial 1 & 2 we can see when the concentration of A doubles all else remaining same rate increases by four times 22
hence a = 2
from the given values trial 1 & 3 we can see when the concentration of B doubles all else remaining same rate remains same 20
hence b = 0
from the given values trial 1 & 4 we can see when the concentration of C doubles all else remaining same rate increases by two times 21
hence c =1
r = k [A]2 [B]0 [C]1 M/s
reaction order with respect to A is 2 and B is 0 and C is 1 Answer (a)
sub values of A B C and r
k = 11.11 M-2 s-1 Answer (b)
rate law is r = k [A]2 [B]0 [C]1 M/s Answer (c)
overall order is 2 + 1 = 3 Answer (d)