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 the reaction.

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.

Front

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

Back

Yes, it is balanced.

Front

How many HCl molecules are needed to balance the equation Mg + __HCl --> MgCl2 + H2?

Back

2 HCl molecules are needed.

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the same number of atoms of each element are present on both sides of the equation, reflecting the conservation of mass.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

What does it mean if an equation is unbalanced?

Back

An unbalanced equation does not have the same number of each type of atom on both sides, indicating that mass is not conserved.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.