Balancing Chemical Equations

Front

What is a coefficient?

Back

The large number in front of a chemical formula.

Front

Is the following reaction balanced? NaHCO3 --> Na2CO3 + H2O + CO2

Back

No

Front

What is the total number of atoms present in 5Na3PO4?

Back

40

Front

Which problem is balanced? (Check ALL answers) PbO2 + 2H2, SO2 + H2O --> H2SO4, 2Na + 2H2O --> 2NaOH + H2

Back

2Na + 2H2O --> 2NaOH + H2

Front

Is the following equation balanced? 2C2H2 + 5O2 --> 4CO2 + 2H2O

Back

Yes

Front

What is a balanced chemical equation?

Back

A chemical equation where the number of atoms for each element is the same on both sides.

Front

What does it mean to balance a chemical equation?

Back

To adjust the coefficients so that the number of atoms of each element is equal on both sides.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

How do you determine if a chemical equation is balanced?

Back

Count the number of atoms of each element on both sides of the equation.

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance.