Scientific Tutor
Chem – Naming Ionic Compounds with Polyatomic Ions Part 1
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 name ionic compounds with polyatomic ions?
The last hurdle to tackle in ionic compounds has to do with polyatomic ions. These examples and practice problems work in the same ways as ionic compounds in the sections just before this one. All the same rules apply.
Examples: Given the name create the chemical compound 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. VIDEO Ionic Naming With a Polyatomic Ions Examples 1.
| Sodium Nitrate | NaNO3 |
| Potassium Sulfite | K2SO3 |
| Iron (III) Carbonate | Fe2(CO3)3 |
VIDEO Ionic Naming Demonstrated Example 6: Given the name create the chemical compound 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.
Beryllium Sulfite
Step 1:
What is the polyatomic ion?
Answer: Sulfite
Step 2:
What are the symbols for the polyatomic ion?
Answer: SO3
| SO3 | ||
| 1 | ||
| 1 | ||
| Total = |
Step 3:
What is the charge of the polyatomic ion?
Answer: -2
| SO32- | ||
| 1 | ||
| 1 | ||
| Total = |
Step 4:
What is the symbol for beryllium?
Answer: Be
| Be | SO32- | |
| 1 | ||
| 1 | ||
| Total = |
Step 5:
What is the charge for beryllium?
Answer: +2
| Be2+ | SO32- | |
| 1 | ||
| 1 | ||
| Total = |
Step 6:
What is the common denominator of 2 and 2?
Answer: 2
| Be2+ | SO32- | |
| 1 | ||
| 1 | ||
| Total = | +2 | -2 |
Step 7:
How much sulfite do you need to add up to -2?
Answer: 1
Step 8:
How much beryllium do you need to add up to +2?
Answer: 1
| Be2+ | SO32- | |
| 1 | ||
| 1 | ||
| Total = | +2 | -2 |
Step 9:
What is the chemical formula for Beryllium Sulfite?
COMPLETE ANSWER: BeSO3
PRACTICE PROBLEMS: Given the name of the chemical compound create the chemical formula 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.
| Copper (I) Hydroxide | CuOH |
| Magnesium Phosphate | Mg3(PO4)2 |
| Zinc (II) Nitrite | Zn(NO2)2 |
| Ammonium Oxide | (NH4)2O |
| Sodium Carbonite | Na2CO2 |
| Iron (III) Cyanide | Fe(CN)3 |
When you finish the lesson, try out the worksheet on nomenclature.
Posted in Chemistry
