Mastering Polyatomic Ions and Their Charges in Chemistry

The video tutorial covers common polyatomic ions encountered in general chemistry. It explains the differences between cations and anions, focusing on specific ions like ammonium, acetate, cyanide, and hydroxide. The tutorial delves into the significance of suffixes in naming ions, such as nitrate and nitrite, and explores related ions like chlorate, perchlorate, and hypochlorite. It also discusses sulfate, sulfite, and hydrogen sulfate ions, along with other ions like chromate, dichromate, oxalate, peroxide, and thiosulfate. The video emphasizes the importance of memorizing these ions for chemistry classes.

Which of the following is a positively charged ion?

• Hydroxide

• Ammonium

• Cyanide

• Acetate

What is the formula for the permanganate ion?

• MnO2-

• MnO3-

• MnO-

• MnO4-

Which suffix indicates a polyatomic ion with more oxygens?

• one

• ide

• ate

• ite

What is the formula for chlorite?

• ClO3-

• ClO2-

• ClO4-

• ClO-

If ClO3- is chlorate, what is BrO3-?

• Perbromate

• Bromite

• Bromate

• Hypobromite

What is the name of SO3 2-?

• Sulfate

• Sulfite

• Sulfide

• Sulfurate

What is the formula for hydrogen carbonate?

• H2CO3

• HCO2-

• HCO3-

• CO3 2-

What is the charge on the phosphate ion?

• 4-

• 3-

• 1-

• 2-

Which ion is known as dichromate?

• CrO4 2-

• Cr2O4 2-

• Cr2O7 2-

• CrO3 2-

What is the formula for thiosulfate?

• S2O3 2-

• SO4 2-

• S2O4 2-

• SO3 2-