Chapter 18.3, Problem 19PP

To determine

The name of the compound ${\text{Cr}}_{\text{2}}{\text{O}}_{\text{3}}$ .

Answer to Problem 19PP

The name of the compound ${\text{Cr}}_{\text{2}}{\text{O}}_{\text{3}}$ is chromium (III) Oxide.

Explanation of Solution

Given:

The compound is ${\text{Cr}}_{\text{2}}{\text{O}}_{\text{3}}$ .

Calculation:

The combination of two more elements is called a compound. The atoms in the compound ${\text{Cr}}_{\text{2}}{\text{O}}_{\text{3}}$ are Chromium and oxygen. The positive ion chromium is a transition metal. On the other hand, Chromium is having oxidation state +3. Thus, the positive ion is Chromium (III).

The negative atom is oxygen and is having -2 oxidation states. Oxygen belongs to group 16 and it needs 2 electrons to complete its outermost shell to attain the noble gas configuration. Thus, the root is ‘Ox’ and then ‘ide’ should be added to the root. The obtained name is Oxide. Therefore, the name of the compound ${\text{Cr}}_{\text{2}}{\text{O}}_{\text{3}}$ is chromium (III) Oxide.

Conclusion:

Hence, the name of the compound ${\text{Cr}}_{\text{2}}{\text{O}}_{\text{3}}$ is chromium (III) Oxide.