* Water (H₂O): This is the classic example! The oxygen atom in water has a stronger pull on the shared electrons than the hydrogen atoms, making it slightly negative. This creates a polar molecule.
* Sugar (Sucrose): Sugar molecules have several polar hydroxyl (-OH) groups, which give them a polar character.
* Vinegar (Acetic Acid): Vinegar contains acetic acid, which has a polar carboxyl group (-COOH).
* Soap: Soap molecules have a polar "head" (typically a carboxylate group) and a non-polar "tail" (usually a hydrocarbon chain). This dual nature allows soap to dissolve in both water and grease.
* Ethanol (Alcohol): The hydroxyl group in ethanol makes it a polar molecule.
How to Recognize a Polar Molecule:
* Electronegativity difference: Look for elements with significant differences in electronegativity (their ability to attract electrons) in the molecule.
* Molecular shape: Molecules that have a bent or asymmetric shape are often polar.
Let me know if you have any more questions!
