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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

Is potassium sulfide (K2S) an ionic or covalent compound?

Neither ionic nor covalent

Covalent

Both ionic and covalent

Ionic

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Verified step by step guidance

Identify the elements involved in the compound K2S: potassium (K) and sulfur (S).

Determine the type of elements: potassium is a metal and sulfur is a nonmetal.

Recall that compounds formed between metals and nonmetals are typically ionic because metals tend to lose electrons and nonmetals tend to gain electrons.

Recognize that potassium (K) loses one electron to form K⁺ ions, and sulfur (S) gains two electrons to form S²⁻ ions, resulting in the formula K2S to balance charges.

Conclude that K2S is an ionic compound due to the electrostatic attraction between the positively charged potassium ions and the negatively charged sulfide ions.