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

What is the correct chemical formula for manganese(VII) arsenide?

MnAs

MnAs_7

Mn_7As_2

Mn_2As_7

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Verified step by step guidance

Identify the oxidation states of the elements involved. Manganese(VII) means manganese has an oxidation state of +7, and arsenide typically has an oxidation state of -3.

Write the ions with their charges: Manganese(VII) ion is \( \mathrm{Mn}^{7+} \) and arsenide ion is \( \mathrm{As}^{3-} \).

Determine the ratio of ions needed to balance the total positive and negative charges so that the compound is electrically neutral. This means the total positive charge must equal the total negative charge.

Set up the charge balance equation: \( 7x = 3y \), where \( x \) is the number of manganese ions and \( y \) is the number of arsenide ions. Find the smallest whole number ratio that satisfies this equation.

Write the chemical formula using the ratio found, placing the number of atoms as subscripts after each element symbol, resulting in \( \mathrm{Mn}_2\mathrm{As}_7 \).