Aluminum Sulfate and Ionic Compounds

The video tutorial explains how to determine the number of ions in aluminum sulfate (Al2(SO4)3). It begins by identifying aluminum as a metal and sulfate as a polyatomic ion, forming an ionic compound. The tutorial covers the ionic charges of aluminum (3+) and sulfate (2-) and demonstrates how to balance these charges to achieve a net charge of zero. Finally, it calculates the total number of ions in aluminum sulfate, which includes two aluminum ions and three sulfate ions, resulting in five ions in total.

What is the chemical formula for aluminum sulfate?

• Al3(SO4)2

• Al2SO4

• Al(SO4)2

• Al2(SO4)3

Which group on the periodic table does aluminum belong to?

• Group 1

• Group 13

• Group 17

• Group 2

What is the ionic charge of a sulfate ion?

• 3+

• 2-

• 1+

• 1-

How many aluminum ions are present in aluminum sulfate?

• Four

• Three

• Two

• One

How many sulfate ions are present in aluminum sulfate?

• One

• Two

• Three

• Four

What is the total number of ions in aluminum sulfate?

• Six

• Five

• Seven

• Four

What is the net charge of the compound aluminum sulfate?

• Zero

• Negative

• Positive

• Variable