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 KP?

potassium phosphide

potassium peroxide

potassium phosphate

potassium phosphite

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Verified step by step guidance

Identify the ions present in the compound KP. 'K' stands for potassium, which forms a cation with a charge of +1 (K\u207a), and 'P' stands for phosphorus, which can form several anions depending on its oxidation state.

Determine the charge and name of the phosphorus ion in this compound. Since the formula is KP, it suggests a 1:1 ratio, meaning phosphorus must have a charge of -1 to balance potassium's +1 charge. However, phosphorus typically forms polyatomic ions like phosphide (P\u2073\u2212), phosphite (PO\u2083\u20323\u2212), or phosphate (PO\u20443\u22123).

Recognize that the simplest phosphorus anion with a -3 charge is phosphide (P\u2073\u2212), which pairs with potassium ions to form potassium phosphide. The formula KP corresponds to potassium phosphide, where potassium (K\u207a) and phosphide (P\u2073\u2212) combine in a 3:1 ratio, but the formula KP suggests a simplified empirical formula.

Eliminate other options: potassium peroxide contains O\u2082\u2212 ions, potassium phosphate contains PO\u20443\u22123 ions, and potassium phosphite contains PO\u2083\u20323 ions. None of these match the formula KP.

Conclude that the correct name for KP is potassium phosphide, as it correctly reflects the ions present and their charges.