Properties of water Water ( H 2 O ) is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from a hint of blue . It is by far the most studied chemical compound and is described as the "universal solvent " for its ability to dissolve many substances. [14] [15] This allows it to be the "solvent of life". [16] It is the only common substance to exist as a solid , liquid, and gas on Earth's surface. [17] Water molecules form hydrogen bonds with each other and are strongly polar. This polarity allows it to separate ions in salts and strongly bond to other polar substances such as alcohols and acids, thus dissolving them. Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass , and a high heat capacity . Water is amphoteric , meaning it is both an
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