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

What is the correct name for the ionic compound Al_2O_3?

Dialuminum trioxide

Aluminum(III) oxide

Aluminum dioxide

Aluminum oxide

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Verified step by step guidance

Identify the ions involved in the compound Al_2O_3. Aluminum (Al) typically forms a +3 charge ion (Al^{3+}), and oxygen (O) forms a -2 charge ion (O^{2-}).

Determine the ratio of ions needed to balance the overall charge. Since Al has a +3 charge and O has a -2 charge, find the smallest whole number ratio that balances the charges: 2 Al^{3+} ions give +6 charge, and 3 O^{2-} ions give -6 charge, resulting in a neutral compound.

Name the cation first, which is aluminum. Since aluminum forms only one common oxidation state (+3), there is no need to specify the charge with Roman numerals in the name.

Name the anion second, which is oxygen. Change the ending of oxygen to '-ide' to form 'oxide'.

Combine the names of the cation and anion to get the correct name: 'Aluminum oxide'. This is the standard naming convention for ionic compounds where the metal has a fixed charge.