What is the systematic name for the tenary ionic compounds: LiMnO4
The Correct Answer and Explanation is:
ChatGPT said:
The systematic name for LiMnO₄ is:
Lithium manganate(VII)
or more commonly: Lithium permanganate
Explanation:
LiMnO₄ is a ternary ionic compound, which means it contains three different elements: lithium (Li), manganese (Mn), and oxygen (O). To systematically name such compounds, each component is analyzed:
- Cation (positive ion):
Lithium (Li) is an alkali metal from Group 1 of the periodic table. In all its compounds, lithium forms a +1 charge ion, written as Li⁺. - Anion (negative ion):
The polyatomic ion present is MnO₄⁻, known as permanganate. This polyatomic ion contains manganese and oxygen. In MnO₄⁻, the oxidation state of manganese is +7. This is because the overall charge of the ion is -1, and oxygen (being more electronegative) usually has an oxidation state of -2. The calculation is as follows: Let oxidation state of Mn be x.x+4(−2)=−1x−8=−1x=+7\text{Let oxidation state of Mn be } x.\\ x + 4(-2) = -1 \\ x – 8 = -1 \\ x = +7Let oxidation state of Mn be x.x+4(−2)=−1x−8=−1x=+7 Therefore, manganese is in the +7 oxidation state. - Combining the ions:
Since lithium has a +1 charge and permanganate has a -1 charge, they combine in a 1:1 ratio to form the neutral compound LiMnO₄. - Systematic name formation:
According to IUPAC rules, the compound is named by stating the cation first, followed by the name of the anion. The anion can also be named systematically by indicating the oxidation state of manganese using Roman numerals:- Lithium manganate(VII)
- Or using the traditional name for MnO₄⁻: Lithium permanganate
Both names are correct, though “lithium permanganate” is more commonly used in practice.
