In cbse 10 science text they have said ca(oh2) is used for white washing.But the answer is cao in all the solution books.plzz explain.
shraddha33204:
Whitewash is a type of paint made from slaked lime (calcium hydroxide, Ca(OH)2) and chalk calcium carbonate, (CaCO3),
And i have not seen anywhere where it is return that cao and not caoh2
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whoever i am what is ur problem
white wash turns in caco3 when caoh reacts with co2. (don't mind the formulae) so basically caoh is formed by adding water to cao... hence the answer is cao...and its obvious that it's cao which reacts with water and not caoh:)
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It is said solution of Ca(OH)2....which means CaO in aqueous form...i had the same doubt ...got it cleared ....
so basically CaO in aqueous form is Ca(OH)2
hope it helps:)
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