Table of contents

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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

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 state of the central metal ion in the complex [Cu(NH3)4]Br2?

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Identify the overall charge of the complex. The complex is [Cu(NH3)4]Br2, which is neutral overall.

Determine the charge contributed by the ligands and counterions. Each bromide ion (Br) has a charge of -1, and there are two bromide ions, contributing a total charge of -2.

Recognize that ammonia (NH3) is a neutral ligand, contributing no charge to the complex.

Set up an equation to find the oxidation state of the central metal ion (Cu). Let x be the oxidation state of Cu. The equation is: x + 0 (from NH3) - 2 (from 2 Br) = 0.

Solve the equation for x to find the oxidation state of the central metal ion, Cu.