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Principles of General Chemistry | 2nd Edition | ISBN: 9780073511085 | Authors: Martin S. Silberberg
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(a) What is the basis of the approximation that avoids

Chapter 17, Problem 32P

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QUESTION:

Problem 32P

(a) What is the basis of the approximation that avoids using the quadratic formula to find an equilibrium concentration?

(b) When should this approximation not be made?

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QUESTION:

Problem 32P

(a) What is the basis of the approximation that avoids using the quadratic formula to find an equilibrium concentration?

(b) When should this approximation not be made?

ANSWER:

Step 1 of 3

During solving equilibrium problems, there is a need to find a change in concentration of components i.e concentration at equilibrium (Value of x). There are various methods to find out the value of x but it depends on the equation form during calculation.

To find out the concentration at equilibrium, the quadratic form of the equation can be used.

The form of the quadratic equation is as follows:

The solution of this equation can be given by

This is very hectic to solve. So, the approximation is made sometimes.

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