General Chemistry Online: Companion Notes: Compounds: Polyatomic ions: Quiz

3. Chlorine dioxide is used as an oxidizing agent in many industrial processes. Because it is explosive, it is never shipped, but prepared as needed by a reaction involving the more stable chlorate ion. The formula of the chlorate ion is:

ClO₄^-

ClO₂^-

ClO₃^-

ClO₃^2-

ClO₄^-2

4. The SCN^- ion forms a bright red complex with iron(II) ions. The SCN^- ion is called the:

thiocyanate ion

thiocyanide ion

thiocyanite ion

cyanate ion

cyanide ion

sulfurocyanide ion

5. Periodate ion is used in staining procedures that improve the quality of microscopic images. The formula of the periodate ion is:

HIO₃^-

IO₄^-

IO₃^2-

IO₄^-2

IO₃^-

6. Sodium aluminate is used in fabric printing processes. If the formula is NaAlO₂, the charge on the aluminate ion must be:

-1

-2

7. Sodium acetate is used in chemical handwarmers and heating pads because it gives up a large amount of heat when it changes from a liquid to a solid. The formula for this compound is:

Na₂C₂H₃O₂

Na₂C₂O₄

NaC₂H₄O

NaC₂H₃O₂

NaAc₂

8. Hypochlorite ion is the active ingredient in Chlorox bleach. The formula of the hypochlorite ion is:

ClO₂^-2

HClO^-

ClO^2-

ClO^-

ClO₃^-

9. Hydroxide ion solutions are sprayed on pretzels to give them their characteristic texture; the ion is removed by reaction with carbon dioxide during baking. The hydroxide ion is:

OH^-

HO₂^-

HO₂⁺

HO₃^-

HO^2-

10. The NO₄^- ion exists in small quantities in the upper atmosphere. Using the naming guidelines for polyatomic ions, the name of this ion would be:

nitrate

nitrite

supernitrate

pernitrate

hyponitrite

General Chemistry Online! Quiz