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 pairs shows the correct name-formula combination for an ionic compound?

Magnesium oxide — MgO2

Sodium chloride — NaCl

Calcium nitrate — CaNO2

Potassium sulfate — KSO4

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Verified step by step guidance

Step 1: Understand that ionic compounds are formed by combining cations (positive ions) and anions (negative ions) in ratios that balance the total positive and negative charges to zero.

Step 2: Identify the charges of the ions involved in each compound. For example, Magnesium typically forms Mg^{2+}, Oxygen forms O^{2-}, Sodium forms Na^{+}, Chloride forms Cl^{-}, Calcium forms Ca^{2+}, Nitrate is NO_3^{-}, Potassium forms K^{+}, and Sulfate is SO_4^{2-}.

Step 3: Check the formula for charge balance by ensuring the total positive charge equals the total negative charge. For example, MgO_2 would imply Mg^{2+} combined with two O^{2-} ions, resulting in a net charge of 2+ and 4- which is unbalanced.

Step 4: Verify the correct formula for each name by matching the correct ion charges and their ratios. For example, Sodium chloride is NaCl because Na^{+} and Cl^{-} combine in a 1:1 ratio to balance charges.

Step 5: Conclude which pairs have the correct name and formula by confirming the charge balance and correct ion formulas, identifying Sodium chloride — NaCl as the correct combination.