Iron III Sulfate Concepts and Formulas

The video tutorial explains how to write the formula for iron III sulfate. It begins by identifying the symbols for iron and sulfate, noting that sulfate is not on the periodic table and requires reference to a common ion table. The charges for iron and sulfate are discussed, with iron having a +3 charge and sulfate a -2 charge. The criss-cross method is used to balance these charges, resulting in the correct formula. The tutorial concludes by verifying the formula through charge multiplication, ensuring the net charge is zero.

What is the chemical symbol for iron in the formula for Iron III Sulfate?

• In

• Fe

• Ir

• I

Which table is used to find the sulfate ion and its charge?

• Elemental Table

• Molecular Table

• Common Ion Table

• Periodic Table

What is the charge on the sulfate ion?

• -1

• -2

• +2

• +3

What does the Roman numeral III indicate in Iron III Sulfate?

• The number of iron atoms

• The atomic number of iron

• The charge on the iron

• The number of sulfate ions

What method is used to balance the charges in the formula for Iron III Sulfate?

• Cross-Check Method

• Charge Method

• Criss-Cross Method

• Balance Method

In the criss-cross method, what happens to the charge numbers?

• They are ignored

• They are swapped and used as subscripts

• They are subtracted

• They are added together

Why are parentheses used around the sulfate ion in the formula?

• To show multiplication

• To indicate a complex ion

• To separate it from iron

• To apply the subscript to the entire ion

What is the net charge of the compound Iron III Sulfate after balancing?

• +3

• +6

• -6

• 0

What is the final formula for Iron III Sulfate?

• Fe3(SO4)2

• Fe2(SO4)3

• Fe(SO4)3

• Fe2(SO3)3