Balancing Chemical Equations Concepts

The video tutorial explains how to balance the chemical equation for copper(II) oxide decomposing into copper and oxygen gas. Initially, the equation is unbalanced with unequal numbers of oxygen atoms. By placing a coefficient of 2 in front of copper(II) oxide, the oxygen atoms are balanced, but the copper atoms become unbalanced. To resolve this, a coefficient of 2 is added in front of copper on the product side, resulting in a balanced equation. The tutorial concludes with a summary of the balanced equation and thanks viewers for watching.

What is the initial imbalance in the chemical equation of copper(II) oxide decomposing?

• There are more copper atoms on the reactant side.

• There are more oxygen atoms on the product side.

• There are more oxygen atoms on the reactant side.

• There are more copper atoms on the product side.

What is the purpose of adding a coefficient in front of copper(II) oxide?

• To balance the copper atoms on both sides of the equation.

• To decrease the number of oxygen atoms on the product side.

• To increase the number of copper atoms on the reactant side.

• To balance the oxygen atoms on both sides of the equation.

After balancing the oxygen atoms, what becomes unbalanced?

• The copper atoms on the reactant side.

• The oxygen atoms on the reactant side.

• The oxygen atoms on the product side.

• The copper atoms on the product side.

How is the imbalance of copper atoms resolved?

• By adding a coefficient in front of oxygen gas.

• By adding a coefficient in front of copper on the product side.

• By removing a coefficient from copper(II) oxide.

• By adding a coefficient in front of copper(II) oxide.

What is the final balanced equation for the decomposition of copper(II) oxide?

• CuO → 2Cu + O2

• 2CuO → Cu + O2

• 2CuO → 2Cu + O2

• CuO → Cu + O

Why is it important to balance chemical equations?

• To increase the reaction rate.

• To ensure the conservation of mass.

• To decrease the reaction rate.

• To change the products of the reaction.