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File Edit View History Bookmarks Window Help ezto.mheducation.com HW2-Kinetics Part 2 3 attempts left Check my work Be sure to answer all parts. The bromination of acetone is acid-catalyzed: CH COCH, Br catalyst CH COCH,Br H+ Br The rate of disappearance of bromine was measured for several different concentrations of acet bromine, and H ions at a certain temperature: Rate of ICH,COCH,l Br Disappearance (M) CA) CA) of Br2(MIs) (i) 0.500 0.0500 0.0500 5.97 x 10 s (2) 0.50n 0.100 0.0500 5.97 x 10 0.0500 0.100 1.19 x 10 4 3) 0.500 (4) 0.665 0.0500 0.200 3.17 x 10 (5) 0.665 0.0500 0.0500 7.94 x 10 (a) What is the rate law for the reaction? rate klCH3CoCH3I IBr. rater kICH COCH rate klCH3COCH rate klCH3CoCH3llBrzlIH I

Explanation / Answer

with respect to CH3COCH3 reaction is first order

with respect to Br2 zero order

with respect to H+   first order.

so rate law as follows

rate = K [CH3COCH3][H+]

K = rate / [CH3COCH3][H+]

K = (5.97 x 10-5 / 0.5 x 0.05)

K = 2.39 x 10-3 M-1s-1

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