Chapter 12.2, Problem 6RQ

Interpretation Introduction

Interpretation:

The difference between polyatomic and simple anions is to be explained.

Concept introduction:

Anions are formed when there is a gain of electrons.

After losing the electrons, the species get a negative charge equal to the number of electrons gained.

Explanation of Solution

Polyatomic anion is a species that contain more than one atom and carry a negative charge and exist as one unit.

A simple anion is an atom carrying a negative charge.

Examples of polyatomic anions are:

  $\mathrm{C}{\mathrm{O}}_3{}^{2-},\mathrm{N}{\mathrm{O}}_3{}^{-},\mathrm{P}{\mathrm{O}}_4{}^{3-}$

Examples of simpleanions are:

  $\mathrm{C}{\mathrm{l}}^{-},{\mathrm{F}}^{-},{\mathrm{O}}^{2-}$

Conclusion

Thus, polyatomic anion contains more than one atom of the same or different type where simple anion contains one atom only.