Balancing Reactions

Front

What must be true about the number of atoms in a chemical reaction?

Back

The number of atoms you begin with in a chemical reaction must be the same as the number of atoms you end with.

Front

How many oxygen atoms are in the compound Al₂(SO₄)₃?

Back

There are 12 oxygen atoms in Al₂(SO₄)₃.

Front

What type of reaction is represented by the equation: Zn + 2HCl -> ZnCl₂ + H₂?

Back

This is a Single Replacement reaction.

Front

What type of reaction is described by the equation: compound -> element + element?

Back

This is a Decomposition reaction.

Front

Which of the following reactions is balanced? PbO₂ + 2H₂, SO₂ + H₂O -> H₂SO₄, 2Na + 2H₂O -> 2NaOH + H₂?

Back

The balanced reaction is 2Na + 2H₂O -> 2NaOH + H₂.

Front

Define a balanced chemical equation.

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

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

What is a synthesis reaction?

Back

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

Front

What is a combustion reaction?

Back

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