Sunday, December 8, 2013

Balanced equation of zinc carbonate + nitric acid = zinc nitrate + carbon dioxide + water

The various species involved in the reaction have the following chemical formulas:


zinc carbonate: ZnCO3


nitric acid: HNO3


Zinc nitrate: Zn(NO3)2


water: H2O


carbon dioxide: CO2


The chemical equation for the reaction can be written as:


`ZnCO_3 + HNO_3 -> Zn(NO3)_2 + H_2O + CO_2`


Let us check if the equation is balanced. A balanced chemical reaction has the same number of each species on the reactant and the product side. 


Zinc: 1 atom on each side


C: 1 atom on each side


O: 6 atoms on reactant side and 9 atoms on product side


H: 1 atom on reactant side and 2 on product side


N: 1 atom on reactant side and 2 on product side.


Thus, apart from zinc and carbon, all other atoms are unbalanced. A simple way to balance them is by using a multiplier of 2 for nitric acid.


The new equation is:


`ZnCO_3 + 2HNO_3 -> Zn(NO_3)_2 + H_2O + CO_2`


Now, if we count, all the species have the same numbers of atoms on both the reactant as well as the product side of the reaction.


Thus, this is the well-balanced chemical equation for the reaction.


Hope this helps. 

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