Balancing Equations and Types of Reactions

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, following the law of conservation of mass.

Front

What is the first step in balancing a chemical equation?

Back

Identify the number of atoms of each element in the reactants and products.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

What type of reaction is represented by the equation: A + B → AB?

Back

Synthesis reaction.

Front

What type of reaction is represented by the equation: AB → A + B?

Back

Decomposition reaction.

Front

What type of reaction is represented by the equation: A + BC → AC + B?

Back

Single replacement reaction.

Front

What type of reaction is represented by the equation: AB + CD → AD + CB?

Back

Double replacement reaction.

Front

How do you determine the type of reaction?

Back

By analyzing the reactants and products to see how they are rearranged.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.

Front

How many atoms of oxygen are in the balanced equation: 2H₂ + O₂ → 2H₂O?

Back

There are 2 atoms of oxygen in the reactants and 2 atoms in the products.