First Semester Final Review #7: Reaction types

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: C2H4 + 3O2 → 2CO2 + 2H2O.

Front

What characterizes a double replacement reaction?

Back

A double replacement reaction involves the exchange of ions between two compounds, resulting in the formation of two new compounds. Example: Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq).

Front

Define ionic compounds.

Back

Ionic compounds are formed when atoms transfer electrons, resulting in the formation of positively and negatively charged ions that are held together by electrostatic forces. Example: NaCl (sodium chloride).

Front

What is a single replacement reaction?

Back

A single replacement reaction occurs when one element replaces another element in a compound. Example: 3Mg + Fe2O3 → 2Fe + 3MgO.

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What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more substances combine to form a new, larger compound. Example: A + B → AB.

Front

What is a decomposition reaction?

Back

A decomposition reaction occurs when a single compound breaks down into two or more simpler substances. Example: 2H2O → 2H2 + O2.

Front

What are molecular compounds?

Back

Molecular compounds are formed when two or more nonmetals share electrons through covalent bonds. Example: H2O (water).

Front

What is the difference between ionic and molecular compounds?

Back

Ionic compounds consist of charged ions held together by ionic bonds, while molecular compounds consist of molecules formed by covalent bonds between nonmetals.

Front

What is the general form of a chemical equation for a synthesis reaction?

Back

The general form is A + B → AB, where A and B are reactants that combine to form a product AB.

Front

What is the general form of a chemical equation for a decomposition reaction?

Back

The general form is AB → A + B, where a compound AB breaks down into its constituent elements or simpler compounds.