Chemical Reactions and Nitrate Ions

The video tutorial demonstrates how to balance the chemical equation Pb(NO3)2 + CuCl2. It begins by introducing the equation and identifying the components involved. The instructor counts the atoms on each side of the equation, focusing on the nitrate ion as a polyatomic ion that remains unchanged during the reaction. By treating the nitrate group as a single unit, the instructor shows how to balance the equation efficiently. The video concludes with a strategy for balancing equations using polyatomic ions, emphasizing the ease of this method.

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

• Pb(NO2)3

• Pb(NO3)2

• Pb(NO3)3

• Pb(NO2)2

Which ion is treated as a single unit in the balancing process?

• Copper ion

• Lead ion

• Nitrate ion

• Chloride ion

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

• Two

• Three

• One

• Four

What is the significance of treating polyatomic ions as single units?

• It increases the number of atoms.

• It simplifies the balancing process.

• It makes the equation more complex.

• It changes the chemical properties.

What is the balanced chemical equation for the reaction between lead(II) nitrate and copper(II) chloride?

• Pb(NO3)2 + CuCl2 → PbCl2 + Cu

• Pb(NO3)2 + CuCl2 → Pb + CuCl2

• Pb(NO3)2 + CuCl2 → Pb(NO3)2 + CuCl2

• Pb(NO3)2 + CuCl2 → PbCl2 + Cu(NO3)2

Who is the presenter of the video tutorial?

• Dr. D

• Dr. A

• Dr. C

• Dr. B