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 a correct formula unit of an ionic compound?

NaCl

CO2

CH4

HCl

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Verified step by step guidance

Step 1: Understand what a formula unit represents. A formula unit is the simplest whole-number ratio of ions in an ionic compound, reflecting the composition of the compound in terms of its constituent ions.

Step 2: Identify the nature of each compound given. Ionic compounds are formed between metals and nonmetals, where electrons are transferred to form positive and negative ions.

Step 3: Analyze each option: NaCl consists of sodium (a metal) and chlorine (a nonmetal), which form ions Na⁺ and Cl⁻, making it an ionic compound with a formula unit NaCl.

Step 4: Recognize that CO₂ and CH₄ are molecular compounds composed of nonmetals bonded covalently, so they do not have formula units but molecular formulas.

Step 5: Note that HCl, although it contains a metal and a nonmetal, is a covalent molecule in its gaseous form and does not form an ionic lattice, so it is not represented by a formula unit.