P1. (Sec. 12.1) Using the following hypothetical balanced reaction, which one of

Question

P1. (Sec. 12.1) Using the following hypothetical balanced reaction, which one of the following Sec. 12.Using the following hypothetical balanced reaction, which one of the following is no a valid epesion for the rate of the reaSIR220 is not a valid expression for the rate of the reaction? a) Rate =-3[A] / t b) Rate (12) [C] / t c) Rate-23, [B] / t d) All of the above are valid expressions of the reaction rate. e) P2. (Sec. 12.1) Using the following balanced equation, which one of the following is not a valid expression for the rate of the reaction? CHCl3 + Cl] CCl4 + HCl a) b) c) d) e) Rate = [HCl] / t Rate--(1 /2) [Cb] / t Rate =-A(CHC13] / t Rate = [CC11] / t All of the above are valid expressions of the reaction rate.

Explanation / Answer

P1)

rate can be written in terms of B as:

rate = -(1/3)*[B]/t

so, c is wrong

Answer: c

P2)

rate can be written in terms of Cl2 as:

rate = -*[Cl2]/t

so, b is wrong

Answer: b

P3)

see experiment 2 and 1:

[H2] doubles

[NO] is constant

rate doubles

so, oder of H2 is 1

see experiment 3 and 1:

[H2] is constant

[NO] doubles

rate becomes 4 times

so, oder of NO is 2

overall order = 1 + 2 = 3

Answer: c

P4)

see experiment 2 and 3:

[S2O8-2] doubles

[I-1] is constant

rate doubles

so, oder of S2O8-2 is 1

see experiment 2 and 1:

[S2O8-2] is constant

[I-1] doubles

rate doubles

so, oder of I-1 is 1

overall order = 1 + 1 = 2

Answer: b

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