   # The charge-balance requirement for a solution of ions requires that a. equal numbers of positive and negative ions are present b. equal moles of positive and negative ions are present c. equal equivalents of positive and negative ions are present d. no correct response ### General, Organic, and Biological C...

7th Edition
H. Stephen Stoker
Publisher: Cengage Learning
ISBN: 9781285853918

#### Solutions

Chapter
Section ### General, Organic, and Biological C...

7th Edition
H. Stephen Stoker
Publisher: Cengage Learning
ISBN: 9781285853918
Chapter 10.15, Problem 3QQ
Textbook Problem
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## The charge-balance requirement for a solution of ions requires that a. equal numbers of positive and negative ions are present b. equal moles of positive and negative ions are present c. equal equivalents of positive and negative ions are present d. no correct response

Interpretation Introduction

Interpretation:

Charge-balance requirement for a solution of ions has to be identified from the given options.

Concept-Introduction:

Charge balance takes place when the sum of concentrations of negative ion and the sum of concentrations of positive ion becomes equal in mEq/L or Eq/L concentration units.

Body fluids have small amounts of different type electrolytes and its concentration is measured in equivalents or mill equivalents per liter. An Equivalent (Eq) of an ion is the molar amount of a certain ion required for supplying one mole of negative or positive charge.

Few examples for the relationship between number of equivalent and charge of an ion is given below,

1 mole = 1 equivalent (For ions with charge 1+ or 1)1 mole = 2 equivalent (For ions with charge 2+ or 2)1 mole = 3 equivalent (For ions with charge 3+ or 3)

### Explanation of Solution

Reason for correct option:

Charge balance takes place when the sum of concentrations of negative ion and the sum of concentrations of positive ion becomes equal in mEq/L or Eq/L concentration units.

Hence, in an electrolytic solution, charge balance occurs when the number of equivalents of positive and negative ions is equal.

Therefore, correct option is (c).

Reason for in-correct option:

In option (a), numbers of positive and negative ions are equal

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