When 4.2 g of sodium hydrogen carbonate is added to a solution of hydrochloric acid
weighing 10g, it is observed that 2.2g of carbon - di - oxide is released into the atmosphere.
The residue left behind is found to weigh 12g. Show that these observations are in accordance
with law of conservation of mass.
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Law of conservation of mass states that mass can neither be created nor be destroyed but it can only transform from one form to another. Mass remains conserved in a chemical reaction.
In a chemical reaction, total mass on the reactant side is always equal to the total mass on the product side.
For the given chemical reaction:
NaHCO3 + CH3COOH = Co2 + residue
Total mass on the reactant side =
4.2g + 10.0g. = 2.2g + 12.0g
14.2g. = 14.2g
Total mass on the product side =
2.2 + 12 = 14.2 g
As, the total mass on the reactant side is equal to the total mass on the product side. Thus, law of conservation of mass is satisfied.
Explanation:
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