Iron and Chromate Compounds

The video tutorial explains how to name the compound Fe2(CrO4)3. It begins by identifying iron as a transition metal and chromate as a polyatomic ion. The tutorial then details the process of naming the metal and the polyatomic ion, followed by determining the charge of iron to ensure a net charge of zero. Finally, the name 'iron(III) chromate' is established, with the Roman numeral indicating the charge of the iron atoms.

What type of metal is iron in the compound Fe2(CrO4)3?

• Alkali metal

• Alkaline earth metal

• Noble gas

• Transition metal

What is the name of the polyatomic ion CrO4 in the compound Fe2(CrO4)3?

• Nitrate

• Chromate

• Phosphate

• Sulfate

Why is it necessary to determine the charge of iron in Fe2(CrO4)3?

• To balance the overall charge of the compound

• To identify the number of iron atoms

• To determine the color of the compound

• To find the melting point of the compound

How many chromate ions are present in Fe2(CrO4)3?

• Two

• One

• Four

• Three

What is the total negative charge contributed by the chromate ions in Fe2(CrO4)3?

• 4-

• 8-

• 6-

• 2-

What Roman numeral is used to indicate the charge of iron in the name of Fe2(CrO4)3?

• I

• II

• III

• IV

What is the correct name for the compound Fe2(CrO4)3?

• Iron(IV) chromate

• Iron(II) chromate

• Iron chromate

• Iron(III) chromate

If given the name Iron(III) chromate, what charge would you expect on the iron ions?

• 2+

• 4+

• 1+

• 3+