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Q.

92% pure Sodium carbonate is used in the reation Na2CO3 + CaCl2  →CaCO3 + 2NaCl. The number of grams of Na2CO3 required to yield one gram of CaCO3

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a

8.5g

b

10.5g

c

11.52g

d

1.152g

answer is D.

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Detailed Solution

But the purity of Na2CO3 is only 92% thus more than 1.06g of Na2CO3 is  requied to produce 1gram of CaCO3 Wt of Na2CO3 required =                                          = 1.152g
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92% pure Sodium carbonate is used in the reation Na2CO3 + CaCl2  →CaCO3 + 2NaCl. The number of grams of Na2CO3 required to yield one gram of CaCO3