Balancing Phosphorus and Calcium Reactions

This video tutorial demonstrates how to balance the chemical equation P4 + Ca yields Ca3P2. It begins by introducing the reactants and products, then proceeds to count the number of phosphorus and calcium atoms on each side of the equation. The tutorial explains the steps to balance the equation by adjusting coefficients, ensuring the same number of each type of atom on both sides. The video concludes with the final balanced equation and a brief summary.

What is the product formed when tetraphosphorus reacts with calcium?

• Calcium phosphide

• Calcium oxide

• Calcium carbonate

• Phosphorus trioxide

How many phosphorus atoms are present on the reactant side of the equation?

• Two

• Three

• Four

• Five

What is the initial step to balance the phosphorus atoms in the equation?

• Add a coefficient of 4 to calcium phosphide

• Add a coefficient of 2 to phosphorus

• Add a coefficient of 3 to calcium

• Add a coefficient of 2 to calcium phosphide

How many calcium atoms are needed on the reactant side to balance the equation?

• Eight

• Four

• Two

• Six

What is the final balanced equation for the reaction?

• P4 + 4Ca → 2Ca3P2

• P4 + 6Ca → 2Ca3P2

• P4 + 2Ca → Ca3P2

• P4 + 3Ca → Ca3P2