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17 August, 00:01

Can I have an example of both a chemical and physical change happening at the same time. It can't be a burning candle, burning wood, or food chewing and digestion.

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  1. 17 August, 00:26
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    Quick lime is calcium oxide. It is an example of physical and chemical change.

    Explanation:

    The physical change is water turning into steam while heating. It's a chemical change. Quicklime is calcium oxide (CaO). When water is added to the calcium oxide, it is converted to calcium hydroxide in the reaction:

    CaO + H₂O - > Ca (OH) ₂

    In geology when earthen materials are exposed to water and are weakened or decomposed. This process is referred to as slaking. Thus, calcium hydroxide resulting from the treatment of quicklime reacting with water form slaked lime.
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