Reaction Types and Balancing

Front

What is a chemical reaction?

Back

A process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Front

What are the main types of chemical reactions?

Back

1. Synthesis 2. Decomposition 3. Single Replacement 4. Double Replacement 5. Combustion

Front

What is a synthesis reaction?

Back

A reaction where two or more reactants combine to form a single product. Example: A + B → AB.

Front

What is a decomposition reaction?

Back

A reaction where a single compound breaks down into two or more simpler products. Example: AB → A + B.

Front

What is a single replacement reaction?

Back

A reaction where one element replaces another in a compound. Example: A + BC → AC + B.

Front

What is a double replacement reaction?

Back

A reaction where the ions of two compounds exchange places to form two new compounds. Example: AB + CD → AD + CB.

Front

How do you balance a chemical equation?

Back

By adjusting the coefficients of the reactants and products to ensure the same number of each type of atom on both sides of the equation.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What are coefficients in a chemical equation?

Back

Numbers placed before compounds in a chemical equation to indicate the number of molecules or moles of that substance.

Front

Balance the equation: C2H6 + O2 → CO2 + H2O

Back

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O.