Chapter 19, Problem 54A

Interpretation Introduction

Interpretation:

A spectator ion is to be explained.

Concept introduction:

In a redox reaction the ions which are oxidized and reduced are called species and the ions which don’t take part in reaction is spectator ion.

Answer to Problem 54A

Spectator ion is which don’t take part in reaction.

Explanation of Solution

Let’s take an example:

$2NaI+C{l}_2\to 2NaCl+I_2$

Here sodium ion remains unchanged during the reaction, so it is spectator ion.

Conclusion

Thus an ion which remains unchanged during a reaction is spectator ion.