To get her house whitewashed, an officer bought 10 kg of quicklime from the market and dissolved it in 30 litres of water.
She noticed that the solution warmed up even when it was not being heated.
What is the corresponding product formed and the type of reaction involved?

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Solution

The reaction of quicklime with water is highly exothermic. Hence, the solution gets warmed up although it was not being heated.

Calcium oxide (CaO) commonly known as quicklime dissolves in water to form slaked lime (calcium hydroxide) $Ca {(OH)}_{2} .$

The reaction occurs as follows:

$CaO (s) + H_{2} O (g) 🡪 Ca {(OH)}_{2} (aq) + heat$

This is a combination reaction and also an exothermic reaction.

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To get her house whitewashed, an officer bought 10 kg of quicklime from the market and dissolved it in 30 litres of water. She noticed that the solution warmed up even when it was not being heated. What is the corresponding product formed and the type of reaction involved?

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She noticed that the solution warmed up even when it was not being heated.
What is the corresponding product formed and the type of reaction involved?