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When 4.2 g NaHCO(3) is added to a solut...

When `4.2 g NaHCO_(3)` is added to a solution of `CH_(3)COOH` (acetic acid) weighing `10 g`, it is observed that `2.2 g`of `CO_(2)` is released to the atmosphere. The residue is found to weigh `12.0 g`. Show that these observations are in agreement with the law of conservation of mass.

Text Solution

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The chemical equation for the reaction is :
`underset("Sod. hydrpgen carbonate")(NaHCO_(3))+underset("Acetic acid")(CH_(3)COOH)rarr`

Weight of reactants = Weight of `NaHCO_(3) +` Weight of `CH_(3)COOH`
`= 4.2 + 10.0 = 14.2 g`
Weight of products = Weight of residue + Weight of `CO_(2) = 12.0 +2.2 = 14.2 g`
Since there is no change in mass during the chemical reaction, these observation are in agreement with the law of conservation of mass.
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