Ch. 1 - A Review of General ChemistryWorksheetSee all chapters
All Chapters
Ch. 1 - A Review of General Chemistry
Ch. 2 - Molecular Representations
Ch. 3 - Acids and Bases
Ch. 4 - Alkanes and Cycloalkanes
Ch. 5 - Chirality
Ch. 6 - Thermodynamics and Kinetics
Ch. 7 - Substitution Reactions
Ch. 8 - Elimination Reactions
Ch. 9 - Alkenes and Alkynes
Ch. 10 - Addition Reactions
Ch. 11 - Radical Reactions
Ch. 12 - Alcohols, Ethers, Epoxides and Thiols
Ch. 13 - Alcohols and Carbonyl Compounds
Ch. 14 - Synthetic Techniques
Ch. 15 - Analytical Techniques: IR, NMR, Mass Spect
Ch. 16 - Conjugated Systems
Ch. 17 - Aromaticity
Ch. 18 - Reactions of Aromatics: EAS and Beyond
Ch. 19 - Aldehydes and Ketones: Nucleophilic Addition
Ch. 20 - Carboxylic Acid Derivatives: NAS
Ch. 21 - Enolate Chemistry: Reactions at the Alpha-Carbon
Ch. 22 - Condensation Chemistry
Ch. 23 - Amines
Ch. 24 - Carbohydrates
Ch. 25 - Phenols
Ch. 26 - Amino Acids, Peptides, and Proteins

Solution: Identify the molecules with polar bonds and the polar molecules.

Solution: Identify the molecules with polar bonds and the polar molecules.

Problem

Identify the molecules with polar bonds and the polar molecules.

Solution

We’re being asked to identify the compounds with polar bonds and are polar molecules.


Recall that the polarity of a bond depends on the electronegativity difference between two atoms:

ΔEN

Polarity

0.0 < x < 0.50

Nonpolar covalent

0.50 ≤ x < 2.0

Polar covalent

2.0 ≤ x

Ionic


A polar bond results in a dipole moment. The net dipole is the sum of all dipole moments in a molecule:

polar molecule: has a net dipole 

nonpolar molecule: has no net dipole


A compound with only nonpolar bonds is a nonpolar molecule.


For each compound, we need to:

Step 1: Determine the polarity of the bonds.

Step 2: Determine the polarity of the molecule.


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