Traditional Culture Encyclopedia - Photography major - In order to find limestone with a purity of more than 85%, Xiaojiang

In order to find limestone with a purity of more than 85%, Xiaojiang

Solution: (1) m(CO2)=1012-107.6=4.4g

(2) From CaCO3 + 2HCl = CaCl2 + CO2 (gas) + H20

100 44

m(CaCO3) 4.4g

Obtain m(CaCO3) =10g

Therefore, the purity S=10/12=83.3 %<85%

Therefore, the sample is unqualified

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