0% Wed Jan 21 11:48 PM Q. E Safar Ed View History Bookmarks Window Help File O O

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0% Wed Jan 21 11:48 PM Q. E Safar Ed View History Bookmarks Window Help File O O O Texas Woman's University CHEM 1123 Spring 15 RIGGS: Quiz #4 twitter.com Reade EEE iCloud Apple Twitter Wikipedia Yahoo! News Pop Facebook Blackboard Learn The Dilemma Texas Woman's University CHEM 1123 Spring15 RIG... Chegg Study I Guided Solutions and Study Help I Chegg.com presented by Sapling Learning Donald McQuarrie.Peter A. Rock Ethan Gallogly For the following reaction: t (s) [H1 (M) CH,0H(aq) H (aq) CI (aq) 2.36 31.0 2.14 the value of [H1was measured over a period of time. Given the data, find the average 56.0 2.02 122.0 1.85 rate of disappearance of H (aq) for the time interval between each measurement. Interval: 0 s to 31.0 s 56.0 s to 122.0 s 31.0 s to 56.0 s Number Number Number Reaction rate: What is the average rate of appearance of CH3Cl(aq) for the same time intervals? 31.0 s to 56.0 s Interval: 0 s to 31.0 s 56.0 s to 122.0 s Number Number Number Reaction rate: M /s Previous Check Answer Next Exit Hin

Explanation / Answer

1) time interval 0 -31s

delta T = t2-t1 = 31-0 = 31

d[H+] =2.14 - 2.36 = - 0.22

rate = d{H+] /dt = -0.22 /31 = - 0.0071 M/s or - 7.1 *10^-3 M/s (answer)

time interval 31-56 s

rate = d[H+] / dt = 2.02 -2.14 / 56-31 = - 0.12 / 25

= - 0.0048 M /s or - 4.8 *10^-3 M/s (answer)

time interval 56 -122 s

rate = d[H+] / dt = 1.85 - 2.02 / 122-56 = - 0.17 / 66

= - 0.0026 M /s or - 2.6 *10^-3 (answer)

As rate of dissapperanceof H+ = rate of apperance of CH3Cl

average rate of appearance

1) time interval 0 -31s = +0.0071 M/s or +7.1 *10^-3 M/s

2) time interval 31-56 s = + 0.0048 M /s (answer) or + 4.8 *10^-3 M/s

3) time interval 56 -122 s = + 0.0026 M/s or +2.6 *10^-3 M/s

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