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The video explores whether water is a good polar solvent through an experiment. Three samples—table salt, sugar, and cooking oil—are added to water. Salt and sugar dissolve, forming solutions, while oil does not, forming a layer on the water's surface. This demonstrates that water is a good polar solvent. Water dissolves most ionic compounds like salt and some covalent compounds like sugar due to hydrogen bonding, but not others like oil, which do not form hydrogen bonds.

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