Balancing Chemical Equations

This video tutorial demonstrates how to balance the chemical equation P4 + Cl2 yields PCl3. It begins by counting the atoms on both sides of the equation, identifying four phosphorus and two chlorine atoms on the reactant side, and one phosphorus and three chlorine atoms on the product side. The tutorial then focuses on balancing the phosphorus atoms by adding a coefficient of four, resulting in four phosphorus atoms on both sides. Next, it balances the chlorine atoms by adjusting the coefficients to achieve twelve chlorine atoms on each side. The video concludes with the final balanced equation and a brief summary.

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

• Four

• Three

• Two

• One

How many chlorine atoms are there on the product side initially?

• One

• Four

• Two

• Three

What coefficient is added to balance the phosphorus atoms?

• Three

• Two

• Five

• Four

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

• Six

• Nine

• Fifteen

• Twelve

What coefficient is used to balance the chlorine atoms on the reactant side?

• Four

• Seven

• Five

• Six