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Problem 5 Easy Difficulty

What is the equilibrium constant for the following reaction? Equilibrium concentrations are given under the formula of each component.
$$\mathrm{PCl}_{3}+\mathrm{Cl}_{2} \rightleftharpoons \mathrm{PCl}_{5}$$

Answer

$K=0.602$

Related Courses

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Organic Chemistry

Chemistry 101
Introduction to General, Organic and Biochemistry

Chapter 7

Reaction Rates and Chemical Equilibrium

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Video Transcript

For question # five, you're asked to write the equilibrium or what? You're asked to determine what is the equilibrium constant. Knowing the equilibrium concentrations that are provided to calculate the equilibrium constant. We first need to know the equilibrium expression for the chemical reaction. It does not indicate that these are all gases, which it should because if it's a liquid or a solid, it wouldn't be included in the expression but they are all gases. So the equilibrium expression will be K, which is the equilibrium constant. We want to calculate equal to the concentration of the products over the concentration of the reactant speech raise to their coefficient concentration is expressed by brackets. So it'll be brackets. PCL five raised to the coefficient of one, divided by brackets. A PCL three raised to the coefficient of one and also in the denominator brackets, chloride raised its coefficient of one. So if we know all of these concentrations which we do at equilibrium, apparently they're all 1.66 Mohler, which is a little hard to believe, but that's okay When we plug in 1.66 Mueller for all of them, You'll see that we end up with 1/1.66 or .602 as our equilibrium constant.

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Frederick A. Bettelheim, William H. Brown, Mary K. Campbell

Introduction to General, Organic and Biochemistry

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