Write the reaction equation: Ca-CaO-Ca (OH) 2.

The first reaction occurs with the interaction of simple substances calcium (Ca) and oxygen (O2): 2Ca + O2 = 2CaO (under normal conditions: room temperature, atmospheric pressure).

The second reaction proceeds spontaneously with the release of a large amount of heat when calcium oxide (CaO) is added to water: CaO + H2O = Ca (OH) 2.



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