Balancing Chemical Equations

Front

What is a chemical equation?

Back

A representation of a chemical reaction.

Front

How many HCl molecules do you need to balance the equation: Mg + __HCl ---> MgCl2 + H2?

Back

2

Front

How many Hydrogen atoms are in 3(NH₄)₂CrO₄?

Back

24

Front

What is a chemical reaction?

Back

A process in which substances undergo chemical changes that result in the formation of new substances.

Front

What does the Law of Conservation of Matter state?

Back

Atoms are not created or destroyed during a chemical reaction.

Front

What are reactants in a chemical reaction?

Back

The starting materials that undergo change.

Front

What are products in a chemical reaction?

Back

The new substances formed as a result of the reaction.

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same 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.

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of a chemical symbol indicating the number of atoms of that element in a molecule.