Review for Chemical Reactions Test

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat. Example: CH₄ + 2O₂ → CO₂ + 2H₂O.

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. Example: 2H₂O → 2H₂ + O₂.

Front

What is a synthesis reaction?

Back

A synthesis reaction is a chemical reaction in which two or more simple substances combine to form a more complex product. Example: 2H₂ + O₂ → 2H₂O.

Front

What is a single-replacement reaction?

Back

A single-replacement reaction is a chemical reaction where one element replaces another in a compound. Example: Zn + 2HCl → ZnCl₂ + H₂.

Front

What is a double-replacement reaction?

Back

A double-replacement reaction is a chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: AgNO₃ + NaCl → AgCl + NaNO₃.

Front

What is a cation?

Back

A cation is a positively charged ion that is formed when an atom loses one or more electrons.

Front

What is an anion?

Back

An anion is a negatively charged ion that is formed when an atom gains one or more electrons.

Front

What is the general formula for a combustion reaction?

Back

The general formula for a combustion reaction is: Hydrocarbon + O₂ → CO₂ + H₂O.

Front

What is the general formula for a decomposition reaction?

Back

The general formula for a decomposition reaction is: AB → A + B, where AB is a compound that breaks down into its elements.

Front

What is the general formula for a synthesis reaction?

Back

The general formula for a synthesis reaction is: A + B → AB, where A and B are elements or simpler compounds that combine.