Balancing Equations

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, indicating that mass is conserved during a chemical reaction.

Front

What are reactants in a chemical equation?

Back

Reactants are the substances that undergo a chemical change in a reaction, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

Front

How do you determine the coefficients in a balanced equation?

Back

Coefficients are determined by adjusting the numbers in front of compounds to ensure that the number of atoms for each element is equal on both sides of the equation.

Front

What is the purpose of balancing chemical equations?

Back

The purpose of balancing chemical equations is to ensure that the same number of atoms of each element is present on both sides, reflecting the conservation of mass.

Front

What is the coefficient of HCl in the reaction: Mg + ___ HCl → MgCl2 + H2?

Back

The coefficient of HCl is 2.

Front

In the equation 4Al + 3O2 → 2Al2O3, how many aluminum atoms are present on the reactant side?

Back

There are 4 aluminum atoms on the reactant side.

Front

What is the significance of the yields sign (→) in a chemical equation?

Back

The yields sign indicates the direction of the reaction, showing that reactants are transformed into products.

Front

What is the balanced equation for the reaction of aluminum with iron(II) oxide?

Back

2Al + 3FeO → Al2O3 + 3Fe.