Question

According to the law of conservation of matter, which chemical equation represents a possible chemical reaction?

Answer 1

Answer : The possible chemical reaction is, (d)

$C_2H_4O_2+NaHCO_3\rightarrow NaC_2H_3O_2+H_2O+CO_2$

Explanation :

Law of conservation of matter : It states that matter can neither be created nor be destroyed but it can only be transformed from one form to another form.

The balanced chemical reaction always follow the law of conservation of matter.

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

(a) The given chemical reaction is:

$2Na+Cl_2\rightarrow NaCl$

This reaction is an unbalanced chemical reaction in which number of atoms of sodium and chlorine are not equal on the both side of the reaction. So, this reaction will not obey the law of conservation of matter.

(b) The given chemical reaction is:

$H_2O_2\rightarrow H_2O+O_2$

This reaction is an unbalanced chemical reaction in which number of atoms of oxygen are not equal on the both side of the reaction. So, this reaction will not obey the law of conservation of matter.

(c) The given chemical reaction is:

$6CO_2+H_2O\rightarrow C_6H_{12}O_6+6O_2$

This reaction is an unbalanced chemical reaction in which number of atoms of hydrogen and oxygen are not equal on the both side of the reaction. So, this reaction will not obey the law of conservation of matter.

(d) The given chemical reaction is:

$C_2H_4O_2+NaHCO_3\rightarrow NaC_2H_3O_2+H_2O+CO_2$

This reaction is a balanced chemical reaction in which number of atoms of carbon, hydrogen, sodium and oxygen are equal on the both side of the reaction. So, this reaction obey the law of conservation of matter.

Hence, the possible chemical reaction is, (d)

$C_2H_4O_2+NaHCO_3\rightarrow NaC_2H_3O_2+H_2O+CO_2$