Balancing Chemical Equations and Phosphate Ions

The video tutorial explains how to balance a chemical equation involving calcium oxide and phosphoric acid. It begins by identifying the reactants and products, then outlines a strategy for balancing the equation by focusing on the phosphate ion. The tutorial proceeds with a step-by-step process to balance calcium, oxygen, and hydrogen atoms, ensuring the equation is balanced on both sides. The video concludes with a summary of the balanced equation and a thank you from Dr. B.

What are the initial reactants in the chemical reaction discussed?

• Calcium carbonate and phosphoric acid

• Calcium oxide and phosphoric acid

• Calcium carbonate and sulfuric acid

• Calcium oxide and sulfuric acid

Why is it beneficial to leave the phosphate ion for later when balancing the equation?

• It reduces the number of steps needed

• It helps in balancing the oxygen atoms first

• It simplifies the balancing of hydrogen atoms

• It makes balancing the equation easier

How many calcium atoms are present on the product side before balancing?

• One

• Two

• Three

• Four

What coefficient is placed in front of CaO to balance the calcium atoms?

• 1

• 2

• 4

• 3

How many oxygen atoms are there after placing a coefficient in front of water?

• Four

• Six

• Two

• Three

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

• 3

• 2

• 4

• 1

How many phosphate ions are present on the product side after balancing?

• One

• Two

• Three

• Four

What is the final balanced equation for the reaction?

• 3CaO + 2H3PO4 → Ca3(PO4)2 + 3H2O

• CaO + H3PO4 → Ca3(PO4)2 + H2O

• 3CaO + H3PO4 → Ca3(PO4)2 + 3H2O

• CaO + 2H3PO4 → Ca3(PO4)2 + H2O

What is the main advantage of counting the phosphate ion as a single unit?

• It increases the number of calcium atoms

• It reduces the number of oxygen atoms

• It simplifies the balancing process

• It helps in balancing hydrogen atoms

Who is the presenter of the balanced equation tutorial?

• Dr. B

• Dr. D

• Dr. A

• Dr. C