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The diagram shown here represents a two-step mechanism. (a) Write the equation for each step and the overall reaction. (b) Identify the intermediate and catalyst. The color codes are $\mathrm{A}=$ green and $B=$ red.

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a. $$\begin{array}{c}\mathrm{A}+\mathrm{B}+\mathrm{B}_{3} \longrightarrow \mathrm{AB}+\mathrm{B}+\mathrm{B}_{2} \\\mathrm{AB}+\mathrm{B}_{2}+\mathrm{B} \longrightarrow 2 \mathrm{B}_{2}+\mathrm{A}\end{array}$$

b. intermediate: AB catalyst: A

Chemistry 102

Chapter 6

Chemical Kinetics

Kinetics

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Vondie figure here and for part A. They want us to write the equations for each step and the overall reaction. So we see that and step one, which is right here, may use a different color. We see step one right here. We have a plus B plus B two, B three, because there's three peas and this one right here. Yield a B plus B plus be to right. This is a B. This is B, and this is B two on the second reaction right here. So we start off with a P plus B plus B to yield. It looks like there is to be to plus one a S o D's to react equation So far d steps. And now they want the overall reaction. So all we gotta do is look at reactant and our products, right? So we see that the reactant right here and our products do you react. Ince's a plus B plus B three and the products is to be two plus a right. So what we can do now is to determine the catalyst, Andy Intermediate. So the catalyst in a reaction is something that increases the rate of the reaction, but it is not changed at all whatsoever. And from this overall reaction we see that Hey, it does not change whatsoever just means that a is the catalyst does the reaction. And now they also want us to determine the intermediate dancer. Media is something that is formed between the reactions, but it's not one of the products, right? So we see that a B is formed in the intermediate step, but it does not come out to be one of the products in the overall reaction. This means that a B is the intermediate of the reaction.

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