Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

3. Chemical Reactions

Naming Ionic Compounds

General Chemistry

3. Chemical Reactions

Naming Ionic Compounds

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Multiple Choice

Why is it incorrect to name the chemical compound Fe2S3 as diiron trisulfide?

Because Fe2S3 is a covalent compound and should use prefixes.

Because the compound contains polyatomic ions that require special naming rules.

Because prefixes like 'di-' and 'tri-' are not used when naming ionic compounds.

Because the name should be iron(II) sulfide instead.

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Verified step by step guidance

Step 1: Identify the type of compound Fe2S3 represents. Fe (iron) is a metal and S (sulfur) is a nonmetal, so Fe2S3 is an ionic compound, not a covalent compound.

Step 2: Recall the naming conventions for ionic compounds: prefixes like 'di-' and 'tri-' are generally used for covalent (molecular) compounds, not ionic compounds.

Step 3: Understand that ionic compounds are named using the metal name followed by the nonmetal name with an '-ide' suffix, and if the metal can have multiple oxidation states, Roman numerals are used to indicate the charge.

Step 4: Determine the oxidation state of iron in Fe2S3 by balancing the charges: sulfur typically has a charge of -2, so for 3 sulfurs, total charge is -6; to balance, the 2 iron atoms must have a total charge of +6, meaning each iron is +3.

Step 5: Therefore, the correct name uses the metal name with its oxidation state in Roman numerals and the nonmetal name: iron(III) sulfide, not diiron trisulfide.