Balancing Chemical Equations Practice

The video tutorial explains how to balance a chemical equation involving P2O5 and H2O to form phosphoric acid. It begins by identifying the reactants and products, then counts the atoms of each element on both sides of the equation. The tutorial demonstrates balancing phosphorus, oxygen, and hydrogen atoms step-by-step, ensuring the equation is balanced. The instructor highlights common mistakes, such as forgetting oxygen atoms in water, and concludes with a balanced equation.

What type of reaction is P2O5 + H2O forming phosphoric acid?

• Double displacement reaction

• Decomposition reaction

• Combination reaction

• Single displacement reaction

How many phosphorus atoms are present on the reactant side before balancing?

• Three

• Two

• Four

• One

What is the total number of oxygen atoms on the reactant side before balancing?

• Six

• Four

• Five

• Seven

What coefficient is placed in front of H3PO4 to balance phosphorus atoms?

• Four

• Two

• One

• Three

After balancing phosphorus, how many oxygen atoms are there on the product side?

• Seven

• Nine

• Six

• Eight

What coefficient is used in front of water to balance hydrogen atoms?

• One

• Two

• Three

• Four

How many hydrogen atoms are present on the product side after balancing?

• Six

• Five

• Seven

• Four

What is the total number of oxygen atoms on the reactant side after balancing?

• Six

• Eight

• Nine

• Seven

What is a common mistake to avoid when counting oxygen atoms in this reaction?

• Ignoring phosphorus atoms

• Counting hydrogen atoms instead

• Forgetting the oxygen in water

• Counting only product side atoms