Balancing Chemical Equations with Nitrate Ions

In this video, Dr. B demonstrates how to balance the chemical equation for lead(II) nitrate and calcium chloride. The process involves counting the atoms and ions on both sides of the equation, focusing on the nitrate ion as a single unit. By ensuring the number of each type of atom is equal on both sides, the equation is balanced. This method simplifies the balancing process, especially when dealing with polyatomic ions.

What is the chemical formula for lead(II) nitrate?

• Pb(NO3)2

• Pb(NO2)3

• Pb(NO3)3

• Pb(NO2)2

How many nitrate ions are present in the reactants of the given equation?

• Three

• Four

• Two

• One

What is the role of the nitrate ion in balancing the equation?

• It is counted twice.

• It is split into individual atoms.

• It is counted as a single unit.

• It is ignored.

Which of the following statements is true about the balanced equation?

• The equation is balanced by counting polyatomic ions.

• The equation is not balanced.

• The equation is balanced by adjusting coefficients.

• The equation is balanced by changing subscripts.

What makes balancing equations with polyatomic ions easier?

• Treating them as a single unit.

• Changing their chemical formula.

• Counting them as separate atoms.

• Ignoring them completely.