_27) Balancing Equations

Front

What is the Law of Conservation of Mass?

Back

It states that matter cannot be created or destroyed.

Front

How do you balance the equation: Mg + ___ HCl → MgCl2 + H2?

Back

2 HCl

Front

What is the correct order for writing ionic compounds?

Back

Cation (+ ion) first then anion (- ion).

Front

What are valence electrons?

Back

Electrons in the outermost energy level.

Front

Balance the chemical reaction: __H2O2 → __H2O + O2.

Back

2 H2O2 // 2 H2O

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What does it mean to balance a chemical equation?

Back

To ensure 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 the number of molecules.

Front

What is a reactant?

Back

A substance that undergoes a chemical change in a reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.