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Why would dissolving salt in water be considered a physical change?
Wiki User
∙ 11y ago
This is a physical change.
This is a an interesting example - it is considered to be physical because the salt can be recovered through evaporation. However the salt in solution is separated into ions which are solvated by water molecules- this could be argued as a chemical change.- as there are albeit weak interactions between the water and the ions.
Some salts dissolve and hydrolysis occurs, a "genuine" chemical reaction with water. An example is sodium acetate, (a salt of a weak acid), this dissolves to give a basic solution- this would be a chemical change. This is reversible - you can evaporate the water and get the salt back.
Wiki User
∙ 11y ago
Dissolving salt in water is considered a physical change because it does not alter the chemical composition of either the salt or water. The salt molecules remain intact in the water, and the process can be reversed by evaporating the water to retrieve the salt.
Wiki User
∙ 11y agoDissolution is not a property but it is a phenomenon.
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