CHEM 1250 Study Guide - Quiz Guide: Hydrogen Bromide, Hypobromous Acid, Bayerischer Rundfunk
Dr. Zellmer Chemistry 1250 Tuesday
Time: 30 mins Spring Semester 2016 April 19, 2016
Quiz III
Name Lab TA/time
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Show ALL your work or EXPLAIN to receive full credit.
1. (8 pts) The following mechanism has been proposed for the reaction of hydrogen bromide, HBr (an
acid), and hydrogen peroxide, H
2
O
2
, in aqueous solution.
(1) H
+
+ H
2
O
2
W
H
3
O
2+
(fast)
(2) H
3
O
2+
+ Br
-
v
H
2
O + HOBr (slow)
(3) H
+
+ HOBr
v
H
2
OBr
+
(fast)
(4) Br
-
+ H
2
OBr
+
v
H
2
O + Br
2
(fast)
(a) What is the overall reaction?
(b) What are the intermediates in the mechanism?
(c) What is the rate-determining step (explain why)?
(d) What is the rate law predicted by this mechanism?
Copyright R. J. Zellmer, April 19, 2016
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