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  4. If law of conservation of mass was to hold true, then 20.8 g of BaCl2 on reaction with 9 8 g of H2SO4 will produce 7.3 g of HCl and BaSO4 equal to

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Q. If law of conservation of mass was to hold true, then $20.8\, g$ of $BaCl_2$ on reaction with $9 8\, g $ of $H_2SO_4$ will produce 7.3 \,g of $HCl$ and $BaSO_4$ equal to

Some Basic Concepts of Chemistry

Solution:

$\underset{208 g }{ BaCl _2}+\underset{98 g }{ H _2} SO _4 \rightarrow \underset{233 g }{ BaSO _2}+\underset{73 g }{2 Hcl }$
Mass of $BaSO _4$ produced
$=20.8+9.8-7.3 $
$=23.3 \,g$