Lead(IV) Nitrate and Polyatomic Ions

The video tutorial explains how to write the chemical formula for lead(IV) nitrate. It begins by identifying the symbols and charges for lead and nitrate using the periodic table and a list of polyatomic ions. Lead is identified as Pb with a 4+ charge, and nitrate as NO3 with a 1- charge. The tutorial then demonstrates how to balance these charges using the crisscross method, resulting in the formula Pb(NO3)4. The video concludes by verifying the formula to ensure a net charge of zero, confirming its correctness.

What is the chemical symbol for lead?

• Pl

• Ld

• Le

• Pb

Which of the following is a polyatomic ion?

• Hydrogen

• Oxygen

• Lead

• Nitrate

What is the charge on the nitrate ion?

• 1-

• 2-

• 1+

• 3+

What is the charge on lead in lead(IV) nitrate?

• 1+

• 3+

• 2+

• 4+

What method is used to balance the charges in lead(IV) nitrate?

• Addition method

• Substitution method

• Crisscross method

• Cross-multiplication

Why do we use parentheses around the nitrate ion in the formula?

• To indicate multiple ions

• To separate it from lead

• To show it is a polyatomic ion

• To balance the equation

How many nitrate ions are needed to balance the charge of lead(IV) in the formula?

• 1

• 4

• 2

• 3

What is the net charge of the correctly balanced lead(IV) nitrate formula?

• 2-

• 0

• 1+

• 4+

What does the Roman numeral IV indicate in lead(IV) nitrate?

• The number of nitrate ions

• The number of electrons

• The charge on lead

• The atomic number of lead

What is the final formula for lead(IV) nitrate?

• Pb2(NO3)4

• Pb(NO3)4

• Pb(NO3)2

• Pb4(NO3)