Chapter 7.3, Problem 38SSC

Interpretation Introduction

Interpretation:

The name and formula of the compound formed from Sodium ions and Nitrite ions.

Concept introduction:

The chemical compounds are named based on the non metal and metal groups. The compound is to have single name though some compounds have alternative names as well. Therefore, common name identifies the chemical compound and its formula. Cation gets name of the elements while anions are named taking its first part adding ‘ide’ at the end.

Answer to Problem 38SSC

The name and formula of the compound formed from Sodium ions and Nitrite ions is ‘ ${\text{NaNO}}_2$ ’ and named as ‘Sodium Nitrite’.

Explanation of Solution

The binary compounds have two elements where one of the elements can be group 1 or Group 2. The naming of this compound follows certain rules wherein the ending word for binary compound is ‘ide’. Also, cation is named first while anion is named second. Cation gets name of the elements while anions are named taking its first part adding ‘ide’ at the end.

The compound formed from Sodium ionsand Nitrite ions is further studied

1. ‘Sodium ions’ is written as ${\text{Na}}^{+}$ and as Sodium has one valence electrons, it will give away one electron to become a positively charged ion.
2. ‘Nitrite ion’ is written as ‘ ${\text{NO}}_2{}^{\text{-1}}$’. It is a polyatomic ion having Nitrogen and 2 oxygen. The Nitrogen forms one double bond with one oxygen and a single bond with one oxygen. It has net charge of -1. (See figure below )



3. To balance the charges of the compound, one of Sodium ion and one of Nitrite ion is required.
4. Now combining both the elements names it is identified as ‘ ${\text{NaNO}}_2$ ’ and named as ‘Sodium Nitrite’.

Conclusion

The name and formula of the compound formed from Sodium ions and Nitrite ionsis ‘ ${\text{NaNO}}_2$ ’ and named as ‘Sodium Nitrite’.