Is dissolution of quick lime a physical change or chemical change?Why?


Dear Stella,

Dissolution of quick lime is a  chemical change.

  • When quick lime is added to water, it reacts to form calcium hydroxide (slaked lime) and heat energy is released.

           CaO(s) + H2O → Ca(OH)2 + heat

              Quicklime         slaked lime

  • A new substance is formed and the we can't get back the original reactants by ordinary physical means. It is an Irreversible Reaction.


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Updated on: 10-Oct-2022

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