Naming and Identifying Cobalt Compounds

The video tutorial explains how to name the compound CoPO4. It begins by identifying cobalt as a transition metal and PO4 as a polyatomic ion, specifically the phosphate ion. The tutorial outlines the steps to name the metal and the ion, emphasizing the need to determine the charge of cobalt, which is +3, and represent it with a Roman numeral. The final name of the compound is cobalt(III) phosphate.

What type of metal is cobalt in the compound CoPO4?

• Noble gas

• Alkaline earth metal

• Transition metal

• Alkali metal

What is the name of the polyatomic ion PO4 in CoPO4?

• Phosphate

• Nitrate

• Carbonate

• Sulfate

When naming CoPO4, what is the first step?

• Determine the overall charge of the compound

• Identify the charge of cobalt

• Write the name of the polyatomic ion

• Write the name of the metal as it appears on the periodic table

Why is it necessary to include a Roman numeral in the name of CoPO4?

• To specify the number of cobalt atoms

• To show the charge of the cobalt ion

• To denote the molecular weight

• To indicate the number of phosphate ions

What is the charge of the phosphate ion in CoPO4?

• 4-

• 3-

• 1-

• 2-

What is the correct name for CoPO4?

• Cobalt(IV) phosphate

• Cobalt phosphate

• Cobalt(II) phosphate

• Cobalt(III) phosphate