Balancing Chemical Equations and Types of Reactions Review

Front

What is the law of conservation of mass in relation to chemical reactions?

Back

The law of conservation of mass states that in a chemical reaction, matter is neither created nor destroyed. This means that the total mass of the reactants must equal the total mass of the products.

Front

How do you determine the coefficients when balancing a chemical equation?

Back

To determine the coefficients when balancing a chemical equation, adjust the numbers in front of the compounds to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is a combustion reaction?

Back

A combustion reaction is a type of chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat. It typically produces carbon dioxide and water.

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.

Front

What is the balanced equation for the reaction of nitrogen and hydrogen to form ammonia?

Back

The balanced equation is N₂ + 3H₂ → 2NH₃.

Front

What is the balanced equation for the combustion of ethylene (C₂H₄)?

Back

The balanced equation is C₂H₄ + 3O₂ → 2CO₂ + 2H₂O.

Front

What is the significance of coefficients in a balanced chemical equation?

Back

Coefficients indicate the relative amounts of reactants and products involved in a chemical reaction, allowing for the calculation of moles and mass relationships.

Front

How do you identify a synthesis reaction?

Back

A synthesis reaction occurs when two or more reactants combine to form a single product. It can often be identified by the general form A + B → AB.

Front

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

Back

The balanced equation is 4Fe + 3O₂ → 2Fe₂O₃.

Front

What are the steps to balance a chemical equation?

Back

1. Write the unbalanced equation. 2. Count the number of atoms of each element on both sides. 3. Adjust coefficients to balance the atoms. 4. Repeat until all elements are balanced. 5. Ensure coefficients are in the simplest ratio.