Scientific Tutor
Chem – Naming Ionic Compounds with Polyatomic Ions Part 2
Author: Andrew
What sections should I know before attempting to learn this section?
—> Covalent, Ionic, and Metallic Bonds
—> Breaking Apart Ionic Compounds
—> Introduction to Polyatomic Ions Part 1
How do you use an ionic name to create the ionic compound with transition metals?
Now let’s try to reverse the question of the problems. Given the chemical formula come up with the name of the ionic compound with polyatomic ions.
Examples: Given the chemical compound, create the name using a regular periodic table. Don’t forget to use the ion periodic table if you need it. You can also refer to the poly atomic ion sheet if you need it. Ionic Naming With a Polyatomic Ions Examples Video 2.
| CsNO3 | Caesium Nitrate |
| Ca(OH)2 | Calcium Hydroxide |
| VCO3 | Vanadium (II) Carbonate |
VIDEO Ionic Naming Demonstrated Example 7: Given the chemical compound, create the name using a regular periodic table. Don’t forget to use the ion periodic table if you need it. You can also refer to the poly atomic ion sheet if you need it.
Fe2(CO2)3
Step 1:
What is the polyatomic ion?
Answer: CO2
| CO2 | ||
| 1 | ||
| 1 | ||
| Total = |
Step 2:
What is the name of the polyatomic ion?
Answer: Carbonite
Step 3:
What is the individual charge of the polyatomic ion?
Answer: -2
| CO22- | ||
| 1 | ||
| 1 | ||
| Total = |
Step 4:
How many of the polyatomic ions are there?
Answer: 3
| CO22- | ||
| CO22- | ||
| CO22- | ||
| Total = |
Step 5:
What is the total charge of the polyatomic ions?
Answer: -6
| CO22- | ||
| CO22- | ||
| CO22- | ||
| Total = | -6 |
Step 6:
What is the name for the symbol Fe?
Answer: Iron
| Fe | CO22- | |
| CO22- | ||
| CO22- | ||
| Total = | -6 |
Step 7:
What is the total charge of the compound?
Answer: +6 -6 = zero
| Fe | CO22- | |
| CO22-– | ||
| CO22- | ||
| Total = | +6 | -6 |
Step 8:
How many Fe atoms?
Answer: 2
| Fe | CO22- | |
| Fe | CO22- | |
| CO22- | ||
| Total = | +6 | -6 |
Step 9:
What is the charge of an individual Fe ion?
Answer: +6 / 2 = +3
| Fe3+ | CO22- | |
| Fe3+ | CO22-– | |
| CO22- | ||
| Total = | +6 | -6 |
Step 10:
What is the Roman numeral that goes with the iron ion?
Answer: III (because it is +3)
Step 11:
What is the complete name of the compound?
COMPLETE ANSWER: Iron (III) Carbonite
PRACTICE PROBLEMS: Given the chemical compound, create the name using a regular periodic table. Don’t forget to use the ionic periodic table if you need it. You can also refer to the poly atomic ion sheet if you need it.
| LiC2H3O2 | Lithium Acetate |
| BaSO4 | Barium Sulfate |
| Rb2SO3 | Rubidium Sulfite |
| WPO4 | Tungsten (III) Phosphate |
| CoCO3 | Cobalt (II) Carbonate |
| NH4Cl | Ammonium Chloride |
Posted in Chemistry
