Balancing Equations and Reaction Types

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed in front of compounds in a chemical equation to indicate the number of molecules or moles of that substance.

Front

What type of reaction is represented by the equation: 2H2 + O2 → 2H2O?

Back

Synthesis reaction, where two or more reactants combine to form a single product.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one reactant breaks down into two or more products.

Front

Identify the type of reaction: 2Na + Cl2 → 2NaCl.

Back

Synthesis reaction.

Front

What is a double replacement reaction?

Back

A double replacement reaction is a type of reaction where two compounds exchange ions or bonds to form two new compounds.

Front

Identify the coefficients in the equation: ___ C3H8 + ___ O2 → ___ CO2 + ___ H2O.

Back

1, 5, 3, 4.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

Identify the type of reaction: 2H2O2 → 2H2O + O2.

Back

Decomposition reaction.

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of light or heat.