Balancing Chemical Reactions and Intermediates

The video tutorial explains how to balance the chemical equation for the reaction between phosphorus pentachloride (PCl5) and water (H2O). It begins by counting the atoms on both the reactant and product sides, focusing on phosphorus, chlorine, hydrogen, and oxygen. The tutorial highlights the challenge of balancing chlorine atoms and demonstrates the correct method to achieve balance. It also discusses the intermediary reaction involving the formation of phosphoric acid and hydrochloric acid. The video concludes with a reference to additional resources for further learning.

What is the initial number of chlorine atoms on the reactant side of the equation?

• Six

• Five

• Four

• Three

How many hydrogen atoms are present on the reactant side initially?

• Four

• Three

• Two

• One

What is the total number of chlorine atoms on the product side before balancing?

• Three

• Four

• Five

• Six

To balance the chlorine atoms, what coefficient is placed in front of HCl?

• One

• Two

• Three

• Four

What is the final balanced equation for the reaction between PCl5 and H2O?

• PCl5 + 2H2O → POCl3 + HCl

• PCl5 + 2H2O → POCl3 + 2HCl

• PCl5 + H2O → POCl3 + 2HCl

• PCl5 + H2O → POCl3 + HCl

What type of reaction is described as an intermediary reaction in the video?

• Combustion

• Decomposition

• Intermediary

• Synthesis

What compounds are formed when phosphorus pentachloride reacts with excess water?

• Phosphoric acid and hydrochloric acid

• Sulfuric acid and hydrochloric acid

• Phosphoric acid and sulfuric acid

• Hydrochloric acid and sulfuric acid

What is the role of water in the intermediary reaction described?

• It acts as a catalyst

• It is a reactant

• It is a product

• It is an inhibitor