Why does not a wall immediately aquire white colour when a coating of slaked lime is applied on it?
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when a wall is coated of slaked lime it doesn't show immediate white colour because the calcium hydroxide when reacts with carbon dioxide then it shows white colour but this reaction is slow and needs minimim of 2 to 3 days
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Explanation:
- A wall immediately acquire white colour when a coating of slaked lime is applied on it.
- Because of the reaction of Calcium hydroxide to the carbon dioxide in the atmosphere is slow and the calcium carbonate layer requires 2-3 days to develop. So to offer a bright white color.
- White colour has calcium hydroxide it is slowly reacts with the presence of carbon dioxide in the air there is the formation of calcium carbonate on walls.
- After some days calcium carbonate gives to the walls a brilliant finish.
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