Chemical Reactions and Polyatomic Ions

In this video, Dr. B demonstrates how to balance the chemical equation for lead(II) nitrate reacting with zinc sulfate. The process involves counting atoms and recognizing polyatomic ions, which remain unchanged during the reaction. By treating polyatomic ions as single units, the balancing process is simplified. The video concludes with a confirmation that the equation is balanced, highlighting the efficiency of this method.

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

• Pb(NO2)3

• Pb(NO3)

• Pb2(NO3)2

• Pb(NO3)2

Which of the following is a polyatomic ion present in the reaction?

• O2

• Pb

• Zn

• SO4

How many nitrate ions are present on the reactant side of the equation?

• One

• Four

• Two

• Three

What is the significance of recognizing polyatomic ions in balancing equations?

• It has no effect on balancing.

• It simplifies the balancing process.

• It requires additional steps.

• It makes balancing more complex.

What is the chemical formula for zinc sulfate?

• Zn2SO4

• Zn(SO4)2

• ZnSO3

• ZnSO4

What does the balanced equation indicate about the number of atoms on each side?

• The number of atoms is irrelevant.

• The number of atoms is equal on both sides.

• There are more atoms on the product side.

• There are more atoms on the reactant side.