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

Which of the following is the correct name for the compound formed when potassium reacts with sulfur?

Potassium sulfur

Potassium sulfate

Potassium disulfide

Potassium sulfide

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Verified step by step guidance

Identify the elements involved in the compound: potassium (K) and sulfur (S).

Determine the charges of the ions formed by each element: potassium typically forms a +1 ion (K\^+), and sulfur typically forms a -2 ion (S\^{2-}).

Balance the total positive and negative charges to form a neutral compound. Since potassium has a +1 charge and sulfur has a -2 charge, two potassium ions are needed to balance one sulfur ion, resulting in the formula K\_2S.

Name the compound by combining the metal name (potassium) with the nonmetal root name (sulf-) and adding the suffix '-ide' to the nonmetal, giving 'potassium sulfide'.

Confirm that the name matches the correct ionic compound naming conventions, which do not use prefixes for ionic compounds and do not include 'sulfate' (which is a polyatomic ion SO\_4\^{2-}) or 'disulfide' (which implies a covalent compound with two sulfur atoms).