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Chemistry 15 Online
OpenStudy (anonymous):

Why cotton is used to cover the conical flask in the reaction CaCO3 and HCl?

OpenStudy (chmvijay):

for the absorption the released gases :) to know the gases released just write the balanced reaction :)

OpenStudy (anonymous):

So you are saying that to find out only Whether or not gases are released.@chmvijay

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