Zinc and Carbonate Compounds

The video tutorial explains how to write the formula for zinc carbonate. It begins by identifying zinc as Zn and carbonate as a polyatomic ion, CO3 2-. The tutorial discusses the nature of ionic compounds, emphasizing the need to balance charges to achieve a neutral compound. Zinc, a transition metal, consistently has a 2+ charge, which balances with the 2- charge of the carbonate ion. The final formula for zinc carbonate is ZnCO3.

What is the symbol for zinc on the periodic table?

• ZnC

• Zc

• Zn

• Z

Which of the following is a polyatomic ion?

• Zn

• O2

• H2O

• CO3 2-

What is the charge on the carbonate ion?

• 1-

• 2-

• 1+

• 2+

Why is zinc considered an exception among transition metals?

• It has a variable charge.

• It is a non-metal.

• It always has a 2+ charge.

• It is not a metal.

What must the total charge be for zinc carbonate to be neutral?

• 3+

• 2+

• 0

• 1-

What is the final formula for zinc carbonate?

• ZnCO3

• ZnC

• Zn2CO3

• Zn(CO3)2

What is the significance of the charges in forming zinc carbonate?

• They ensure the compound is neutral.

• They determine the color of the compound.

• They change the state of matter.

• They affect the melting point.