How do you know when a chemical equation is balanced

Asked by admin @ 30/10/2021 in Chemistry viewed by 310 People

A chemical equation is balanced if the number of each type of atom on the left side is equal to the number of each type on the right side. Is this reaction balanced?

Answered by admin @ 30/10/2021

Answer:

See explanation below

Explanation:

You are not putting the equation to balance. I found a question which is pretty the same as this one and put the following reaction:

H₂ + O₂ ------> H₂O

If you have a different equation please post again the question.

According to the above reaction, we can say that it's not balanced.

The reason is because in the reactants we have 2 atoms of hydrogen and oxygen, but in the products, we only have 1 atom of oxygen. so both sides do not have the same number of atoms.

To balance, we need to put a number in the product or reactant as coefficient in order to balance the whole reaction. In this case, as Oxygen is unbalanced, I will put a 2 in the products to balance the oxygen:

H₂ + O₂ ------> 2H₂O

But putting this 2 will unbalance the hydrogen in the products. We now have 4 atoms of hydrogen. What should we do now?, yes, we put a 2 in the reactants to balance the hydrogen, and then, the whole equation is balanced.

2H₂ + O₂ ------> 2H₂O

Hope this helps

How do you know when a chemical equation is balanced

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