When 4.2 g of sodium bicarbonate are added to a solution of acetic acid weighing 10.0 g, it is observed that 2.2 g of carbon dioxide is released into the atmosphere. The residue left is found to weigh 12.0 g. Show that these observations are in agreement with the law of conservation of mass.

When 4.2 g of sodium bicarbonate are added to a solution of acetic aci

1.	When 4.2 g of sodium bicarbonate are added to a solution of acetic acid weighing 10.0 g, it is observed that 2.2 g of carbon dioxide is released into the atmosphere. The residue left is found to weigh 12.0 g. Show that these observations are in agreement with the law of conservation of mass.
Answer» Solution :Sodium bicarbonate `(NaHCO_3)` reacts with acetic acid (`CH_3COOH`) according to the FOLLOWING equation. `UNDERSET(4.2 g)(NaHCO_(3)) + underset(10.0g)(CH_(3)COOH) to underset("Residue" 12.0g)(CH_(3)COONa+ H_(2)O) + underset(2.2 g)(CO_(2))` The total mass of the reactants `(NaHCO_(3) + CH_(3)COOH) = 4.2+ 10.0 = 14.2 g` The total mass of products `(CH_(3)COONa + H_(2)O + CO_(2)) = 12.0 + 2.2 = 14.2 g` Since, the total mass of the products is the same as that of the reactants, the observations are in agreement with the LAW of conservation of mass.