Experimental data is collected from a reaction between X, Y, and Z. Analyze the
ID: 1089560 • Letter: E
Question
Experimental data is collected from a reaction between X, Y, and Z. Analyze the data below and answer the following questions.
Initial [X]
Initial [Y]
Initial [Z]
RATE( mol/L*s)
0.01
0.04
0.10
2x103
0.01
0.12
0.10
18x103
0.03
0.04
0.10
2x103
0.01
0.04
0.30
6x103
A) What is the specific rate law expression for this reaction. Show your work for determining this expression.
B) Show your calculations and determine the rate constant.
Initial [X]
Initial [Y]
Initial [Z]
RATE( mol/L*s)
0.01
0.04
0.10
2x103
0.01
0.12
0.10
18x103
0.03
0.04
0.10
2x103
0.01
0.04
0.30
6x103
Explanation / Answer
if [X] changes rate does not changing so zero order with respec to X
if [Y] triplled rate increased 9 times so second order with respect to Y
if [Z] triplled rate also triplled so first order with respect to Z
rate law as follows
rate = K [Y]2 [Z]
B) K = rate / [Y]2[Z]
K = 0.002 / [0.04]2[0.10]
K = 0.002 / 0.00016
K = 12.5 M-2 s-1
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