Chapter 7.3, Problem 19PP

Interpretation Introduction

Interpretation: The formula for the ionic compound formed by potassium and iodine needs to be determined.

Concept introduction:

Ionic compounds are formed as the result of the formation of positive as well as negative ions. Electrons are basically transformed from one atom to another for the formation of a rare gas electron structure for each ion.

The atom that forms a positive ion will loses electrons to the atom that basically gains electrons for formation of a negative ion.

Answer to Problem 19PP

Formula is $\mathrm{Kl}$ .

Explanation of Solution

Formula for the ionic compounds formed by potassium and iodine is $\mathrm{Kl}$ .

The charge on K ion is +1 and that on I ion is -1 thus, to form a neutral compound, 1 mol of K ion should react with 1mol of I ion.

The chemical equation is represented as follows:

  ${\text{K}}^{+}+{\text{I}}^{-}\to \text{KI}$

Here, 1 electron from K is transferred to 1 I atom.

The electronic configuration is represented as follows:

  

Conclusion

Therefore, $\mathrm{Kl}$ is the required formula.