Balanced

Definition

A chemical equation is balanced when the number of atoms for each element is the same on both sides of the equation. This ensures the conservation of mass in a chemical reaction.

5 Must Know Facts For Your Next Test

1. Balancing a chemical equation involves adjusting coefficients, not subscripts.
2. A balanced equation reflects the law of conservation of mass, meaning matter cannot be created or destroyed.
3. Each side of a balanced equation must have the same number and type of atoms for all elements involved.
4. Balancing equations often requires iteratively adjusting coefficients to achieve equality.
5. In some cases, polyatomic ions can be treated as single units to simplify balancing.

Review Questions

• Why is it important to balance a chemical equation?
• What rule must you follow when adding coefficients to balance an equation?
• How do you verify that an equation is balanced?

Related terms

Coefficient: A numerical value placed in front of a chemical formula in an equation to indicate how many molecules or moles are involved.

Reactants: Substances present at the beginning of a chemical reaction that are consumed during the reaction.

Products: Substances formed as a result of a chemical reaction.