Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

3. Ionic Compounds

Naming Ionic Compounds

GOB Chemistry

3. Ionic Compounds

Naming Ionic Compounds

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1:39 minutes

Problem 44d

Textbook Question

Write the formula for the polyatomic ion and name each of the following compounds:
d. Fe(HCO₃)₃

Verified step by step guidance

Step 1: Identify the polyatomic ion in the compound. The formula HCO₃⁻ represents the bicarbonate ion, which is a polyatomic ion composed of hydrogen, carbon, and oxygen.

Step 2: Recognize the metal cation in the compound. The formula Fe represents iron, which can have multiple oxidation states. In this case, the compound contains Fe³⁺ because it is paired with three bicarbonate ions (HCO₃⁻).

Step 3: Determine the name of the polyatomic ion. The name of HCO₃⁻ is bicarbonate (or hydrogen carbonate).

Step 4: Combine the name of the metal cation with its oxidation state in Roman numerals and the name of the polyatomic ion. Since the iron cation has a +3 charge, its name is iron(III).

Step 5: Write the full name of the compound. The name of Fe(HCO₃)₃ is iron(III) bicarbonate.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Polyatomic Ions

Polyatomic ions are ions composed of two or more atoms covalently bonded together, which carry a net charge. They are essential in understanding chemical formulas and naming compounds, as they often represent complex groups of atoms that behave as a single unit in chemical reactions. Examples include carbonate (CO₃²⁻) and bicarbonate (HCO₃⁻).

Iron (Fe) Oxidation States

Iron can exhibit multiple oxidation states, commonly +2 and +3, which are crucial for determining the correct formula and name of iron-containing compounds. In the compound Fe(HCO₃)₃, iron is in the +3 oxidation state, indicating that it is bonded to three bicarbonate ions, each contributing a -1 charge, balancing the overall charge of the compound.

Nomenclature of Ionic Compounds

The nomenclature of ionic compounds involves naming the cation (positive ion) followed by the anion (negative ion). For compounds containing polyatomic ions, the name of the polyatomic ion is used directly. In the case of Fe(HCO₃)₃, the compound is named iron(III) bicarbonate, reflecting the iron's oxidation state and the presence of the bicarbonate ion.

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