Question

Which is the balanced equation for V2O5 + CaS → CaO + V2S5?

V2O5 + CaS → CaO + V2S5
5V2O5 + 5CaS → 10CaO + 5V2S5
3V2O5 + 3CaS → 3CaO + 3V2S5
V2O5 + 5CaS → 5CaO + V2S

Answer 1

Answer : The correct option is,
`V_2O_5+5CaS\rightarrow 5CaO+V_2S_5`

Explanation :

Balanced chemical equation : In the balanced chemical equation the number of individual elements present on the reactant side must be equal to the number of individual elements present on the product side.

The given balanced chemical reaction will be,

`V_2O_5+5CaS\rightarrow 5CaO+V_2S_5`

There are 2 vanadium atoms present on reactant and product side. Therefore, vanadium is balanced.

There are 5 oxygen atoms present on reactant and product side. Therefore, oxygen is balanced.

There are 5 calcium atoms present on reactant and product side. Therefore, calcium is balanced.

There are 5 sulfur atoms present on reactant and product side. Therefore, sulfur is balanced.

Answer 2

The right answer is: V2O5 + 5CaS → 5CaO + V2S5.

In chemistry, an equation establishes what happened during a chemical reaction. On the left side of the equation, we place the reagents that were used for the experiment and on the right, the products obtained during the experiment. According to the principle of conservation of the mass (Lavoisier) during a chemical reaction, no atom disappears, none is created, they combine differently. In summary, you must have the same number of atoms of each element on the right as on the left of the equation. This is why a balance equation must always be balanced.

Vanadium (symbol V) is the chemical element of atomic number 23.

Vanadium pentoxide (V 2 O 5) is used in ceramics and as a catalyst; it is also responsible for hot corrosion by gases (fluxage).