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

13. Liquids, Solids & Intermolecular Forces

Molecular Polarity

General Chemistry

13. Liquids, Solids & Intermolecular Forces

Molecular Polarity

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Multiple Choice

Which of the following best describes the molecular polarity of iodine pentafluoride (IF_5)?

IF_5 is amphiprotic and can act as both an acid and a base.

IF_5 is ionic and therefore does not have molecular polarity.

IF_5 is a polar molecule.

IF_5 is a nonpolar molecule.

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Verified step by step guidance

Step 1: Determine the molecular geometry of iodine pentafluoride (IF_5). Iodine (I) is the central atom bonded to five fluorine (F) atoms, and there is one lone pair on iodine. This gives IF_5 a square pyramidal shape according to VSEPR theory.

Step 2: Recall that molecular polarity depends on both the polarity of individual bonds and the overall shape of the molecule. Each I-F bond is polar because fluorine is more electronegative than iodine.

Step 3: Analyze the symmetry of the molecule. The square pyramidal shape is asymmetrical due to the lone pair, which means the dipole moments of the I-F bonds do not cancel out completely.

Step 4: Conclude that because the dipole moments do not cancel, IF_5 has a net dipole moment, making it a polar molecule.

Step 5: Understand that the other options are incorrect because IF_5 is not amphiprotic (it does not donate or accept protons), it is a covalent molecule (not ionic), and it is not nonpolar due to its asymmetrical shape and polar bonds.