What type of change is dissolving salt in water and why?
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For example:
When water (H2O)changes from solid ice to liquid water, that is a physical change. The chemical makeup (hydrogen and oxygen) is not altered. When salt and sugar dissolve in water it is a physicalchange. The chemical makeup of thesalt and sugar are not changed.
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Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed. Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state.
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