EXplain the chemical reaction involved in whitewhashing. Why do walls get a shine after a few days of whitewhashing?

Asked by  | 30th Aug, 2010, 12:00: AM

Expert Answer:

 


When Lime or calcium oxide is dissolved in a large amount of water It forms a white solid called Calcium Hydroxide or slaked lime which is applied on walls and specially roof .

 

CaO + H 2O---->Ca(OH) 2

This reacts slowly with carbon dioxide of air and forms a thin shining layer of calcium carbonate.

 

Ca(OH)2 +CO2 --->CaCO3+ H2O

Answered by  | 30th Aug, 2010, 06:57: PM

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