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10 September, 01:03

Is dissolving salt a chemical change or physical change and why?

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  1. 10 September, 01:51
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    It's a physical change because the composition of the salt hasn't change. Only the change in substance/form has occured. To tell if something has undergone physical change is:

    • Melting

    • Boiling

    • Freezing

    • Condensing

    • Breaking

    • Bending

    • Dissolving

    • Molecules can change motion and proximity

    To tell if something changed chemically:

    • Molecules rearrange with other molecules to make new substance

    • Can be production of flames

    • Color change

    • Bubbling/fizzing

    • Temp. change

    • change in composition
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