What would you observe when calcium oxide is added to water?
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Answer:
Calcium hydroxide {Ca(OH)2} is produced with release of heat
Explanation:
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You should not have used the word “combine” in your question. The correct word is “mix”. In chemistry the word “combine” has a special meaning. We say, for example, “chemically combined together”. Elements combine to form compounds, and can only do so in specific proportions. When mixed, calcium oxide and water react together highly exothermically to form calcium hydroxide:
CaO(s)+H2O(l)→Ca(OH)2(s) ΔH<<0
If water is dripped slowly onto a lump of calcium oxide, a hissing is heard as excess water is turned to steam by the heat produced in the reaction.
Explanation:
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