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

6. Chemical Quantities & Aqueous Reactions

Calculate Oxidation Numbers

General Chemistry

6. Chemical Quantities & Aqueous Reactions

Calculate Oxidation Numbers

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Multiple Choice

What is the oxidation number of hydrogen (H) in the compound HPO4^2-?

-1

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Verified step by step guidance

Identify the general rule for the oxidation number of hydrogen. In most compounds, hydrogen has an oxidation number of +1.

Recognize the compound given: HPO4^2-. This is a polyatomic ion with an overall charge of -2.

Assign the oxidation number of +1 to hydrogen (H) based on the general rule.

Consider the oxidation number of oxygen (O) in the compound. Oxygen typically has an oxidation number of -2.

Set up an equation to solve for the oxidation number of phosphorus (P) using the known oxidation numbers and the overall charge of the ion: (1 * +1) + (1 * P) + (4 * -2) = -2. Solve for P to ensure the sum of oxidation numbers equals the charge of the ion.