A, sugar and salt do not dissolve in oil because They are both ionic compounds while oil is a molecular compound They are both molecular compounds while oil is a n ionic compound Sugar is polar and oil is not; salt is an ionic compound and cannot form ion-dipole interactions with oil because oil is non-polar. Sugar can form hydrogen bonds while oil cannot; salt is polar while oil is non-polar B .The oil droplets move back toward the top of the jar because 1. Oil is not soluble in water 2. Oil is less dense, hence lighter, than water 3. Both 1 and 2 4. The salt or sugar cause the oil to move back up
The Correct Answer and Explanation is:
Answer:
- For the first part: The correct explanation is C: Sugar is polar and oil is not; salt is an ionic compound and cannot form ion-dipole interactions with oil because oil is non-polar. Sugar can form hydrogen bonds while oil cannot; salt is polar while oil is non-polar. Explanation:
The solubility of substances in a particular solvent is influenced by the “like dissolves like” principle, which means that polar substances tend to dissolve in polar solvents and non-polar substances in non-polar solvents. Sugar is a polar molecule with hydroxyl (–OH) groups capable of forming hydrogen bonds with water molecules, making it highly soluble in water. However, oil is non-polar and does not interact well with polar molecules like sugar. Salt, on the other hand, is an ionic compound, which dissociates into ions (Na+ and Cl-) in water and forms ion-dipole interactions with water molecules. Since oil is non-polar, it cannot form ion-dipole interactions, which is why salt does not dissolve in oil. - For the second part: The correct answer is 3: Both 1 and 2.Explanation:
When oil is added to water, the oil droplets move back toward the top of the jar due to two factors:- Oil is not soluble in water: Oil and water have different polarities, and as a result, they do not mix. Water molecules are polar, whereas oil molecules are non-polar. This difference prevents the oil from dissolving in the water.
- Oil is less dense than water: Oil has a lower density compared to water, which causes it to float on top. Since oil is less dense than water, the oil droplets rise to the surface and remain at the top of the jar.
