Question

For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants....

For the reaction A+B+C→D+E, the initial reaction rate was measured for various initial concentrations of reactants. The following data were collected:
Trial [A]
(M)
[B]
(M)
[C]
(M)
Initial Rate
(M/s)
1 0.10 0.10 0.10 3.0×10−5
2 0.10 0.10 0.30 9.0×10−5
3 0.20 0.10 0.10 1.2×10−4
4 0.20 0.20 0.10 1.2×10−4

Part A

What is the reaction order with respect to A?

Part B

What is the reaction order with respect to B?

Part C

What is the reaction order with respect to C?

Homework Answers

Answer #1

rate= k [A]x [B]y [C]z

from data table

3.0 x 10^-5 =k [0.1]x [0.1]y [0.1]z ------------->(1)

9.0 x 10^-5 =k [0.1]x [0.1]y [0.3]z ------------->(2)

1.2 x 10^-4 =k [0.2]x [0.1]y [0.1]z ------------->(3)

1.2 x 10^-4 =k [0.2]x [0.2]y [0.1]z ------------->(4)

by solving 1 & 2 , we get

z = 1

by solving 1 & 3 , we get

x = 2

by solving 3 & 4 , we get

y = 0.

rate= k [A]2 [B]0 [C]1

reaction order with respect to A = 2

reaction order with respect to B = 0

reaction order with respect to C = 1

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