Balancing Equations and Reaction Types

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in a balanced equation that indicates the number of molecules or moles of that substance involved in the reaction.

Front

What does a subscript indicate in a chemical formula?

Back

A subscript indicates the number of atoms of an element in a molecule. For example, in H₂O, the subscript '2' indicates there are two hydrogen atoms.

Front

What is the purpose of balancing a chemical equation?

Back

The purpose of balancing a chemical equation is to ensure that the number of atoms of each element is the same on both sides of the equation, adhering to the law of conservation of mass.

Front

Identify the type of reaction: 2H₂ + O₂ → 2H₂O

Back

Synthesis reaction.

Front

Identify the coefficients of the following equation: ___ C + ___ O₂ → ___ CO₂

Back

1, 1, 1.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler substances.

Front

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

Back

Synthesis reaction.

Front

Identify the coefficients of the following equation: ___ Fe + ___ O₂ → ___ Fe₂O₃

Back

4, 3, 2.

Front

What is a single replacement reaction?

Back

A single replacement reaction is a type of chemical reaction where one element replaces another in a compound.

Front

Identify the type of reaction: 2H₂O → 2H₂ + O₂

Back

Decomposition reaction.