Final answer:
A solution of 70% hexane and 30% acetone is partially polar, as it contains both nonpolar and polar components. Molecules with both polar and nonpolar regions are amphipathic. The solubility of substances in water or nonpolar solvents follows the principle of 'like dissolves like.'
Step-by-step explanation:
A solution containing 70% hexane and 30% acetone would be classified as partially polar (Option C). Hexane is a nonpolar solvent, while acetone is a polar solvent due to its polar C=O double bond and the overall molecular dipole it creates. A solution with both components would have intermediate polarity, not being completely nonpolar like hexane or polar like pure acetone, but rather having characteristics of both. When considering solubility, polar substances like acetone have stronger interactions with polar solvents like water, and nonpolar substances like hexane prefer nonpolar solvents such as hydrocarbons, due to similar types of intermolecular forces.
Molecules like acetone that contain both polar and nonpolar groups are referred to as amphipathic. In the context of solubility, methanol (CH3OH) and sodium sulfate (Na2SO4) would dissolve in water, which is a polar solvent, whereas octane (C8H18), an example of a nonpolar compound, would not. The varying solubility patterns are dictated by the principle that 'like dissolves like,' meaning that polar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar substances.