Why do we call Ba(NO3)2 barium nitrate, but we call Fe(NO3)2 iron(II) nitrate?

Name: Problem 11, Chapter 2: Chemistry
Uploaded: 2020-05-11T17:49:42-08:00
Duration: 2 min 8 s
Channel: Leslee Manner
Description: Why do we call Ba(NO3)2 barium nitrate, but we call Fe(NO3)2 iron(II) nitrate?

step 1 We are going to name these two following compounds. Right here, we know this is barium. And this

Why do we call Ba(NO3)2 barium nitrate, but we call Fe(NO3)2...

Key Concepts

Oxidation States

Oxidation states indicate the charge an element carries in a compound and are essential for understanding chemical reactivity. In compounds where the metal has only one common oxidation state (such as barium with +2), there is no ambiguity. However, when a metal, like iron, can exist in multiple oxidation states, specifying the exact state becomes necessary.

Chemical Nomenclature

Chemical nomenclature is a system that uses standardized rules to name compounds based on their composition. When an element in a compound has a fixed charge (as in barium compounds), its name does not include its oxidation number. In contrast, for elements with variable oxidation numbers, the name must indicate the specific oxidation state to remove ambiguity about the compound's composition.

Transition Metals

Transition metals, such as iron, often exhibit multiple oxidation states. This variability requires that chemical names of their compounds include the precise oxidation state (using Roman numerals) to distinguish between different compounds of the same metal that have different chemical properties.

IUPAC Naming Conventions

The IUPAC naming conventions guide the systematic naming of inorganic compounds. These rules stipulate that if a metal has more than one oxidation state, the name must include the oxidation number in parentheses. This is why compounds containing iron are named with the oxidation state (for example, iron(II) nitrate), whereas compounds with barium, a metal with a single, common oxidation state, are named without such an indication.

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