Question

Chemistry of Volcanic Gases: Balance the following reactions that occur among volcanic gases. Place coefficients directly in front of the compound, leaving no spaces. If it is a 1, please type 1. Type the lowest whole number coefficient.
SO2(g) +
O2(g) ->
SO3(g)


H2S(g) +
O2(g) ->
SO2(g) +
H2O(g)

Answer 1

Answer : The  balanced chemical reaction will be,

$2SO_2(g)+1O_2(s)\rightarrow 2SO_3(g)$

$16H_2S(g)+8O_2(s)\rightarrow 3SO_2(g)+16H_2O(g)$

Explanation :

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

(1) The given unbalanced chemical reaction is,

$SO_2(g)+O_2(s)\rightarrow SO_3(g)$

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of oxygen are not balanced.

In order to balanced the chemical reaction, the coefficient 2 is put before $SO_2$ and $SO_3$.

Thus, the balanced chemical reaction will be,

$2SO_2(g)+1O_2(s)\rightarrow 2SO_3(g)$

(2) The given unbalanced chemical reaction is,

$H_2S(g)+O_2(s)\rightarrow SO_2(g)+H_2O(g)$

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of oxygen are not balanced.

In order to balanced the chemical reaction, the coefficient 16 is put before $H_2S$ and $H_2O$, the coefficient 8 is put before $O_2$ and the coefficient 3 is put before $SO_2$.

Thus, the balanced chemical reaction will be,

$16H_2S(g)+8O_2(s)\rightarrow 3SO_2(g)+16H_2O(g)$

Answer 2

In balancing reactions, it is important to remember that each of the side in the reaction should have the same number of elements. We do as follows:

2SO2(g) + O2(g) -> 2SO3(g)


H2S(g) + 3/2O2(g) -> SO2(g) + H2O(g)

Hope this answers the question. Have a nice day.