Balancing Chemical Equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during a chemical reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients (the numbers in front of the compounds) to ensure that the number of atoms for each element is equal on both sides.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What does a coefficient in a chemical equation represent?

Back

A coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

Balance the equation: ___ SeCl₆ + ___ O₂ → ___ SeO₂ + ___ Cl₂.

Back

1, 1, 1, 3

Front

Balance the equation: ___ H₂ + ___ O₂ → ___ H₂O.

Back

2, 1, 2

Front

How many total atoms are in 5Na₃PO₄?

Back

40

Front

How many Mn atoms are in 3Cr(MnO₄)₆?

Back

18

Front

Is the equation 2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O balanced?

Back

Yes

Front

What is the purpose of balancing chemical equations?

Back

The purpose is to ensure that the same number of each type of atom is present before and after the reaction, reflecting the conservation of mass.