Balancing Chemical Equations

The video tutorial demonstrates how to balance a chemical equation involving magnesium and phosphoric acid. It begins by identifying the atoms and ions present, then proceeds to balance the phosphate ions, hydrogen atoms, and finally the magnesium atoms. The tutorial emphasizes the use of coefficients to achieve balance and concludes with a balanced equation.

What is the initial number of magnesium atoms on the reactant side?

• Four

• One

• Three

• Two

Why is the phosphate ion treated as a single unit during balancing?

• It reacts with hydrogen.

• It is a complex ion.

• It simplifies the balancing process.

• It has a high atomic mass.

What coefficient is placed in front of H3PO4 to balance the phosphate ions?

• 4

• 1

• 2

• 3

How many hydrogen atoms are there after balancing with the coefficient in front of H2?

• 8

• 6

• 4

• 2

What is the final coefficient for magnesium on the reactant side to balance the equation?

• 1

• 2

• 3

• 4

What is the product formed along with magnesium phosphate in the balanced equation?

• Oxygen gas

• Hydrogen gas

• Nitrogen gas

• Carbon dioxide

What is the final balanced chemical equation?

• Mg + H3PO4 → Mg3(PO4)2 + H2

• 3Mg + 2H3PO4 → Mg3(PO4)2 + 3H2

• Mg + 2H3PO4 → Mg3(PO4)2 + H2

• 3Mg + H3PO4 → Mg3(PO4)2 + 3H2