Ionic Charges and Aluminum Compounds

The video tutorial explains how to write the chemical formula for aluminum perchlorate. It begins by identifying aluminum as a metal with a 3+ charge and perchlorate as a polyatomic ion with a 1- charge. The tutorial details the process of balancing these charges to form the compound Al(ClO4)3, emphasizing the need for parentheses around the perchlorate ion due to its polyatomic nature. The video concludes with a summary of the steps involved in deriving the formula.

What is the element symbol for aluminum?

• Am

• Al

• Au

• Ag

What is the formula for the perchlorate ion?

• ClO2

• ClO4

• ClO3

• ClO

What is the ionic charge of the perchlorate ion?

• 2-

• 1+

• 2+

• 1-

In which group is aluminum found on the periodic table?

• Group 1

• Group 13

• Group 17

• Group 18

What is the charge of an aluminum ion?

• 4+

• 3+

• 1+

• 2+

How many perchlorate ions are needed to balance the charge of one aluminum ion?

• 4

• 3

• 2

• 1

What is the correct formula for aluminum perchlorate?

• AlClO3

• Al(ClO4)2

• Al(ClO4)3

• AlClO4