Balancing Chemical Equations and Types of Reactions Review

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, following the law of conservation of mass.

Front

What is the first step in balancing a chemical equation?

Back

Identify the number of atoms of each element in the reactants and products.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

What type of reaction is represented by the equation: 2 H₃AsO₄ → As₂O₅ + 3 H₂O?

Back

Decomposition reaction.

Front

How many total atoms are in the molecule H₂O₂?

Back

4 atoms (2 hydrogen and 2 oxygen).

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change results in the formation of new substances with different properties.

Front

What is the balanced equation for the reaction of iron and oxygen to form iron(III) oxide?

Back

4Fe + 3O₂ → 2Fe₂O₃.

Front

What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product.

Front

What is a decomposition reaction?

Back

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