Barium Hydroxide and Polyatomic Ions

The video tutorial explains how to write the chemical formula for barium hydroxide. It begins by identifying barium on the periodic table and recognizing hydroxide as a polyatomic ion. The tutorial discusses the formation of ionic compounds, emphasizing the need to balance charges to achieve a neutral compound. It provides a step-by-step guide to writing the formula, including the use of subscripts and parentheses, and concludes with a verification of the formula's correctness.

What is the element symbol for barium?

• Ba

• Bi

• Be

• Br

Which of the following is a polyatomic ion?

• Hydroxide

• Sulfate

• Barium

• Chloride

What is the charge of a barium ion?

• 1+

• 2+

• 1-

• 2-

What is the charge of the hydroxide ion?

• 2-

• 1-

• 2+

• 1+

How do you balance the charges in barium hydroxide?

• Change the element

• Adjust the subscripts

• Add more barium ions

• Add more hydroxide ions

Why do we use parentheses in the formula for barium hydroxide?

• To show the charge

• To separate elements

• To indicate a polyatomic ion

• To balance the equation

What is the net charge of a correctly balanced barium hydroxide compound?

• 1+

• 0

• 1-

• 2-

What is the final formula for barium hydroxide?

• Ba2OH

• Ba(OH)2

• BaOH2

• BaOH

Who is the presenter of the video?

• Dr. D

• Dr. C

• Dr. B

• Dr. A