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Why does the walls shine after two or three days of whitewashing?
Wiki User
∙ 9y ago
We know that slaked lime (produced by mixing water and calcium oxide) is used for white washing the walls.
CaO + H2O ----> Ca(OH)2
This calcium hydroxide when reacts with Carbon di oxide in air forms a thin layer of Calcium carbonate and water is evaporated (this process takes two to three days).
Ca(OH)2 + CO2 ---> CaCO3 + H2O
property of calcium carbonate--> It gives shinny finish
Therfore the walls shines after two of three days of white washing
Wiki User
∙ 9y ago
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