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

2. Bromate ion was baked into bread until recently as a preservative; it has been found to cause cancer in laboratory animals. The formula of the bromate ion is

BrO₃^2-

HBrO₃^-

BrO₄^-2

BrO₄^-

BrO₃^-

3. Iodate ion is used as a disinfectant. The formula of the iodate ion is

IO₄^-2

IO₃^2-

HIO₃^-

IO₃^-

IO₄^-

4. Perbromate ion is extremely unstable for quantum mechanical reasons. If it existed, the formula of the perbromate ion could be:

BrO₄^-2

BrO₃^-

BrO₃^2-

BrO₄^-

HBrO₃^-

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

IO₃^-

IO₄^-2

HIO₃^-

IO₃^2-

IO₄^-

6. 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:

NaAc₂

Na₂C₂O₄

NaC₂H₃O₂

NaC₂H₄O

Na₂C₂H₃O₂

7. 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:

HO₃^-

HO₂^-

HO^2-

OH^-

HO₂⁺

8. Chlorite compounds are extremely explosive when they come into contact with combustible material. The formula of the chlorite ion is:

ClO₂^-

HClO₃^-

ClO₃^-

ClO^2-

ClO₂^-2

9. Sodium sulfate occurs in nature as the minerals mirabilite and thenardite. The formula of the sulfate ion is:

SO₃^2-

SO₄^-

S₂O₃^-2

SO₄^2-

HSO₄^-

10. Sulfite ion is often used to "fix" photographic film during development. The formula of the sulfite ion is:

HSO₄^-

SO₃^-

SO₄^2-

S₂O₃^-2

SO₃^2-

General Chemistry Online! Quiz