Sulfate Ion and Barium Chemistry

The video tutorial explains how to write the formula for barium sulfate. It begins by identifying the element symbols for barium and sulfate, noting that sulfate is a polyatomic ion with a charge of 2-. The tutorial emphasizes the importance of memorizing common polyatomic ions like sulfate. It then explains how to balance the ionic charges between barium, which has a 2+ charge, and sulfate, resulting in a neutral compound. The final formula for barium sulfate is presented as BaSO4.

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

• Be

• B

• Br

• Ba

Which of the following is a polyatomic ion?

• SO4

• O2

• Cl

• Na

What is the chemical formula for the sulfate ion?

• S2O4

• SO4

• SO3

• SO2

What is the ionic charge of the sulfate ion?

• 1-

• 2+

• 1+

• 2-

What is the final chemical formula for barium sulfate?

• BaSO3

• BaSO4

• BeSO4

• BaO4