Write the proper ionic formula for each of the two given ions and name the compound formed: 1. Fe(II) and S 2. Fe(III) and S 3. Co(III) and O
Understand the Problem
The question asks to write the ionic formulas and name the compounds formed from the following pairs of ions:
- Fe(II) and S
- Fe(III) and S
- Co(III) and O This involves determining the charges of the ions and combining them in the correct proportions to form neutral compounds, then applying the appropriate nomenclature to name each compound.
Answer
* Fe(II) and S: FeS, Iron(II) sulfide * Fe(III) and S: Fe2S3, Iron(III) sulfide * Co(III) and O: Co2O3, Cobalt(III) oxide
Here are the ionic formulas and names for each compound:
- Fe(II) and S: FeS, Iron(II) sulfide
- Fe(III) and S: Fe2S3, Iron(III) sulfide
- Co(III) and O: Co2O3, Cobalt(III) oxide
Answer for screen readers
Here are the ionic formulas and names for each compound:
- Fe(II) and S: FeS, Iron(II) sulfide
- Fe(III) and S: Fe2S3, Iron(III) sulfide
- Co(III) and O: Co2O3, Cobalt(III) oxide
More Information
When writing the formulas, the charges of the ions are crossed over to become the subscripts of the other ion. The name of the metal cation is followed by the nonmetal anion with the suffix '-ide'. For metals with multiple possible charges, Roman numerals indicate the charge.
Tips
A common mistake is not reducing the subscripts to the lowest whole number ratio.
Sources
- 2.3: Naming Ionic Compounds - Chemistry LibreTexts - chem.libretexts.org
- 3.4: Naming Ionic Compounds - Chemistry LibreTexts - chem.libretexts.org
- Binary Ionic Compounds Containing a Metal Ion With a Variable ... - chem.purdue.edu
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