A housewife wanted her house to be whitewashed. She bought 10 kg of quick lime from the market and dissolved it in 30 liters of water. She noticed that water started boiling even when it was not being heated. Give a reason for her observation. Write the corresponding equation and name the product formed.

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Solution

Slaked lime is also called calcium hydroxide(CaOH)₂ and is formed when water is added to quick lime(CaO)
Chemical reaction:
$CaO (s) + H_{2} O (l) \to Ca {(OH)}_{2} (s) + Heat$
Therefore, the above chemical is an exothermic reaction so heat is released during reaction. This is the reason water appeared to be boiling.

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Slaked lime is also called calcium hydroxide(CaOH)2 and is formed when water is added to quick lime(CaO)Chemical reaction:CaO(s)+H2O(l)→Ca(OH)2(s)+HeatTherefore, the above chemical is an exothermic reaction so heat is released during reaction. This is the reason water appeared to be boiling.