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Ch.2 - Atoms, Molecules, and Ions
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 67e

Give the chemical formula for (e) permanganate ion.

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1
Identify the name of the ion: permanganate.
Recall that permanganate is a polyatomic ion.
Understand that the permanganate ion contains manganese (Mn) and oxygen (O).
The permanganate ion has a chemical formula of \( \text{MnO}_4^- \).
Note that the permanganate ion carries a -1 charge.

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Ionic Compounds

Ionic compounds are formed when atoms transfer electrons, resulting in the formation of charged ions. These ions are held together by electrostatic forces in a lattice structure. Understanding ionic compounds is essential for recognizing how ions like permanganate interact with other substances in chemical reactions.
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Ionic Compounds Naming

Polyatomic Ions

Polyatomic ions are ions composed of two or more atoms covalently bonded together, which carry a net charge. The permanganate ion (MnO4-) is a common example, consisting of one manganese atom and four oxygen atoms. Recognizing the structure and charge of polyatomic ions is crucial for writing correct chemical formulas.
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Polyatomic Ion Variations

Oxidation States

Oxidation states indicate the degree of oxidation of an atom in a compound, reflecting the number of electrons lost or gained. In the permanganate ion, manganese typically has an oxidation state of +7, which is important for understanding its reactivity and role in redox reactions. Mastery of oxidation states is vital for predicting the behavior of ions in chemical equations.
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02:42
Oxidation Numbers