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  4. When 6.3 g of sodium bicarbonate are added to 30.0 g of acetic acid solution, the residual solution is found to weigh 33.0 g. The mass of carbon dioxide released in the reaction is

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Q. When $6.3\, g$ of sodium bicarbonate are added to $30.0\, g$ of acetic acid solution, the residual solution is found to weigh $33.0\, g$. The mass of carbon dioxide released in the reaction is

J & K CETJ & K CET 2011Some Basic Concepts of Chemistry

Solution:

$ CH_{3}COOH+NaHCO_{3}\rightarrow CH_{3}COONa $ $ +\,H_{2}O+CO_{2} $
$ \because $ Amount of reactants $ =6.3+30.0=36.3\,g $
$ \because $ Amount of residual solution $ =33.0\,g $
$ \therefore $ Mass of carbon dioxide released $ =36.3-33.0 $
$ =3.3\,g $