ma 1-13 Quiz 1 Answer Key

# ma 1-13 Quiz 1 Answer Key - C k = 4.01 x 10^-3 M-1 s 1 D...

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Answer Key Quiz 1/13 1 . A. Rate 1 /Rate 2 = [S 2 O 8 2- ] m /[ S 2 O 8 2- ] m = ([S 2 O 8 2- ]/[ S 2 O 8 2- ]) m Which becomes (3.9 x 10 -6 /2.6 x 10 -6 ) =(0.027/0.018) m This simplifies to (3/2) = (3/2) m , which can only be true if m = 1 Rate 3 /Rate 1 ) = ([S 2 O 8 2- ] 1 /[ S 2 O 8 2- ] 2 )([I - ] 1 n /[I - ] 2 n ) Yielding, for convenience using Expt 3/Expt 1; (7.8 x 10 -6 /2.6 x 10 -6 ) = (0.036/0.018)(0.054 n /0.036 n ) = (2/1)(0.054 n /0.036 n ) = (0.108 n /0.036 n ) = (0.108/0.036) n Simplify both sides, we get (3/1) = (3/1) n , which again can only be true if n = 1 B. second order overall
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Unformatted text preview: C. k = 4.01 x 10^-3 M-1 s 1 D. Positive slope with ln[A] on the y axis and time on the x axis 2 . negative slope with ln [A] on the axis and time on the x axis 3. Use the Arrhenius equation ln(k 1 /k 2 )= (E a /R) [1/T 2 – 1/T 1 ] Change temperature to Kelvin and plug and chug until ln(k 1 /k 2 )= 4.481 Raise 4.481 to get rid of the ln and your answer should be 88.3 or approximately 90 times faster...
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