⚖️ BALANCING CHEMICAL EQUATIONS

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Last updated 5:20 PM on 9/8/26
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5 Terms

1
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Why do we balance chemical equations?

To ensure there is the same number of atoms of each element on both sides of the equation.

2
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What must be the same on both sides of a balanced equation?

The number of atoms of every element.

3
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What do the large numbers in front of formulas represent?

They are coefficients and show the ratio/number of particles or molecules involved in the reaction.

Example:

2H₂ + O₂ → 2H₂O

4
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What is the most important rule when balancing equations?

You may change the coefficients in front of formulas, but you must not change the subscripts inside formulas.

5
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Why can't you change subscripts when balancing?

Changing a subscript changes the substance itself.

For example, H₂O and H₂O₂ are different substances.