Question: Balance the chemical equation \[Ca{{C}_{2~}}+{{H}_{2}}O\to Ca{{\left( OH \right)}_{2~}}+{{C}_{2}}{{H...

Question

Balance the chemical equation $Ca{{C}_{2~}}+{{H}_{2}}O\to Ca{{\left( OH \right)}_{2~}}+{{C}_{2}}{{H}_{2}}.$

Answer 1

Solution

We know that the chemical equation is defined as the symbolic representation of compounds by their symbols, or formulae performing a chemical reaction, left side including reactants, and the right side with the products formed. The balancing of a chemical equation is based on the conservation law of mass.

Complete answer:
First, let us know about the balanced chemical equation. It is defined as the total number of atoms present on the left side, or the reactants are equal to the atoms present on the right side, or products. We can say it is the rearrangement of atoms. As mentioned, the chemical equation needs to be balanced and is related with the concept of law of conservation of mass, it states that the mass is neither created nor destroyed.

So, we can say the mass of an element used in the reaction at the beginning will be equal to the mass of the element formed at the end of reaction, or the product side. Calcium carbide reacts with water to produce calcium hydroxide and acetylene. The balanced equation is
$\underset{Calcium\text{ }Carbide}{\mathop{Ca{{C}_{2~}}}}\,+\underset{Water}{\mathop{2{{H}_{2}}O}}\,\to \underset{Calcium\text{ }Hydroxide}{\mathop{Ca{{\left( OH \right)}_{2}}}}\,+\underset{Acetylene}{\mathop{{{C}_{2}}{{H}_{2}}}}\,$
We can say here that the number of atoms is the same on both sides. If we talk about the mass, then the mass will also remain unchanged of the atom as the number of atoms is the same as mentioned. Thus, when the chemical reaction is performed, the atoms are neither created, nor destroyed. So, in the end we can conclude that the law of conservation of mass should be followed to balance the chemical equation.

Note:
Note that there is no need for confusion while understanding the importance of balancing the chemical equation. Just remember the number and the mass of atoms, or molecules on the left side that is reactant side must be equal to that of the right side which is the product side.