Given a reaction between an organic molecule, denoted as A, and NaSH, we observe the following observations. Using the observations, write a rate law for the reaction.(a) The rate triples when the concentration of [A] is tripled and the concentration of [NaSH] is held constant.(b) The rate is decreased when the concentration of [A] is doubled and the concentration of [NaSH] is cut by a factor of 3.(c) The rate doubles when the concentration of [A] is cut in half and the concentration of [NaSH] is quadrupled.(d) The rate increases with an increase in temperature. write the rate law

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Asked Sep 25, 2019
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Given a reaction between an organic molecule, denoted as A, and NaSH, we observe the following observations. Using the observations, write a rate law for the reaction.

(a) The rate triples when the concentration of [A] is tripled and the concentration of [NaSH] is held constant.
(b) The rate is decreased when the concentration of [A] is doubled and the concentration of [NaSH] is cut by a factor of 3.
(c) The rate doubles when the concentration of [A] is cut in half and the concentration of [NaSH] is quadrupled.
(d) The rate increases with an increase in temperature.
 

write the rate law 

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Expert Answer

Step 1

Rate law is the mathematical relationship obtained by comparing reaction rates with concentration of reactant. It can be simply expressed as follows for a reaction   nA + nB  --- P

Here, R is rate of reaction, K is rate constant, square brackets represent concentration, and n and m are numbers of moles.

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R K [A Bm

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Step 2

From the given information, rate of reaction is

As it is given that the rate of reaction increases by 3 times when concentration ...

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R K[ANaSHm -1) R2 3R,K[3A [NaSH]m (2) NaSH NaSH 21K3A 3=(3) n 1

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