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 name for the ionic compound Mg_3(PO_4)_2?

Magnesium diphosphate

Magnesium phosphate

Magnesium phosphite

Trimagnesium phosphate

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Verified step by step guidance

Identify the cation and anion in the formula $\mathrm{Mg_3(PO_4)_2}$. Here, $\mathrm{Mg^{2+}}$ is the cation (magnesium ion) and $\mathrm{PO_4^{3-}}$ is the anion (phosphate ion).

Determine the charges of the ions: magnesium ion has a charge of +2, and phosphate ion has a charge of -3.

Check the ratio of ions in the formula to ensure charge neutrality. Three $\mathrm{Mg^{2+}}$ ions contribute a total charge of $3 \times (+2) = +6$, and two $\mathrm{PO_4^{3-}}$ ions contribute a total charge of $2 \times (-3) = -6$. The charges balance out, confirming the formula is correct.

Name the compound by naming the cation first followed by the anion. The cation $\mathrm{Mg^{2+}}$ is named 'magnesium' and the anion $\mathrm{PO_4^{3-}}$ is named 'phosphate'.

Combine the names without prefixes because ionic compounds do not use prefixes to indicate the number of ions. The correct name is 'magnesium phosphate'.