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6.2 gm of a sample containing Na2CO3, Na...

6.2 gm of a sample containing `Na_2CO_3, NaHCO_3` & non volatile impurity on gentle heating loses `5%` of its weight due to the reaction `2NaHCO_3 rarr Na_2CO_3 + CO_2 + H_2O` Residue is dissolved in water to form 100 ml solution & its 10 ml portion requires 7.5 ml of 0.2 M aqueous solution of `BaCl_2` for complete precipitation of carbonates . What is the weight of `Na_2CO_3` in gm in the origin sample ?

A

1.59

B

1.06

C

0.53

D

None

Text Solution

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The correct Answer is:
B
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