Aluminum and Sulfite Compounds

The video tutorial explains how to write the chemical formula for aluminum sulfite. It begins by identifying the element symbols and recognizing sulfite as a polyatomic ion with a 2- charge. The tutorial then discusses the need for charge balance in neutral compounds and introduces the crisscross method to achieve this. By applying the method, the correct formula for aluminum sulfite is derived, ensuring the charges balance to zero. The video concludes with a verification of the formula and a brief sign-off by Dr. B.

What is the chemical symbol for aluminum?

• Am

• Al

• Au

• Ag

What is the charge of the sulfite ion?

• 1-

• 2-

• 3-

• 2+

Which group on the periodic table does aluminum belong to?

• Group 1

• Group 13

• Group 17

• Group 3

What method is used to balance the charges in the formula for aluminum sulfite?

• Cross-multiplication

• Crisscross method

• Addition method

• Substitution method

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

• To indicate it is a polyatomic ion

• To highlight its charge

• To show it is a single element

• To separate it from other ions

What is the final formula for aluminum sulfite?

• Al2(SO3)3

• Al(SO3)2

• Al3(SO3)2

• Al(SO3)3

How do the charges in the formula for aluminum sulfite balance out?

• 2 times 3- equals 6- and 3 times 2+ equals 6+

• 3 times 3- equals 9- and 2 times 2+ equals 4+

• 3 times 2- equals 6- and 2 times 3+ equals 6+

• 2 times 2- equals 4- and 3 times 3+ equals 9+