Balancing equations review

Front

Is this equation balanced? 2H2 + O2 -> 2H2O

Back

No

Front

The large number before a molecule is called a _______________

Back

coefficient

Front

Which problem is balanced? PbO2 + 2H2 -> H2SO4, SO2 + H2O -> H2SO4, 2Na + 2H2O -> 2NaOH + H, 2Na + 2H2O -> 2NaOH + H2

Back

2Na + 2H2O -> 2NaOH + H2

Front

Balance this equation: MgCl2 -> Mg4 + Cl2

Back

4MgCl2 -> Mg4 + 4Cl2

Front

In the following chemical equation: FeO + CO -> Fe + CO2, which compound(s) are the products?

Back

Fe and CO2

Front

What is a balanced equation?

Back

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

Front

What are reactants in a chemical equation?

Back

Substances that undergo a chemical change in a reaction.

Front

What are products in a chemical equation?

Back

Substances that are formed as a result of a chemical reaction.

Front

What does it mean to balance an equation?

Back

To ensure that the number of atoms of each element is equal on both sides of the equation.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.