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Why does salt remain in water while all other substances settle out?
Wiki User
∙ 12y ago
Salt, NaCl, is a compound made from sodium and chlorine. A sodium atom has a highly positive electric charge and a chlorine atom has a highly negative charge. This difference in charge causes an ionic bond between the atoms to form salt.
Water is polar, meaning that its molecules have a positively charged side and a negative charged side. When salt is put in water, the water molecules push and pull on the sodium and chlorine in the salt. The sodium and chlorine atoms are eventually pulled apart and slip and slide through the sea of water molecules. The positive and negative parts of the salt are still bonded to each other, but just able to move freely through the water.
Salt and most other substances with ionic bonds dissolve like this, but rocks, sand, and dirt don't. Being more dense, they fall to the bottom in a bucket of water while the salt stays dissolved and dissociated in the fluid. At least I think that's what you were asking for...
Wiki User
∙ 12y ago
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