Question

Given a reaction between an organic molecule, denoted as A, and NaSH, we observe the following...

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.

Rate Law = ?

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Answer #1

(a) The rate triples when the concentration of [A] is tripled and the concentration of [NaSH] is held constant.

Thus, the rate is directly proportional to the concentration of [A].

This indicates that the order of the reaction with respect to A is first.

(c) The rate doubles when the concentration of [A] is cut in half and the concentration of [NaSH] is quadrupled.

This indicates that the order of the reaction with respect to NaSH is first.

Rate Law
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