Aluminum and Phosphate Compounds

The video tutorial explains how to write the formula for aluminum phosphate. It begins by identifying aluminum on the periodic table and recognizing phosphate as a polyatomic ion. The tutorial emphasizes the ionic nature of the compound and the need for charge balancing, with aluminum having a 3+ charge and phosphate a 3- charge. The charges balance to zero, resulting in the formula AlPO4. The video concludes with a summary of the process.

What is the element symbol for aluminum as found on the periodic table?

• Au

• Al

• Am

• Ag

Which of the following is a polyatomic ion that is not found on the periodic table?

• Sulfate

• Chloride

• Nitrate

• Phosphate

What is the charge of the aluminum ion?

• 1+

• 2+

• 3+

• 4+

How do the charges of aluminum and phosphate ions combine to form a neutral compound?

• 2+ and 2-

• 1+ and 1-

• 4+ and 4-

• 3+ and 3-

What is the chemical formula for aluminum phosphate?

• AlPO3

• Al3(PO4)2

• Al2(PO4)3

• AlPO4