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

3. 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:

NaC₂H₄O

Na₂C₂H₃O₂

NaC₂H₃O₂

Na₂C₂O₄

NaAc₂

4. 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^-

BrO₄^-2

HBrO₃^-

BrO₄^-

BrO₃^2-

5. Sodium peroxide can be used for oxygen generation in diving bells and submarines, since it reacts with carbon dioxide and produces oxygen gas. The peroxide ion has the formula:

O₂^2-

O^2-

O₂⁺

O₂^-

O₃^-

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. NaClO₄ is used to manufacture explosives. NaClO is the active ingredient in Chlorox bleach. The names of the anions in these compounds are, respectively,

	tetroxychlorine and monoxychlorine		exochloride and endochloride
	chlorate and chlorite		perchlorate and hypochlorite
	quadrochloroxide and monochloroxide		hyperchlorite and hypochlorite

8. Nitrates are used in making rocket propellants, fertilizers, dynamite, and fireworks. The formula of the nitrate ion is:

NO₄^-

NO₃^-

N₂O₃^-2

NO₃^2-

NO₂^-

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

ClO₂^-

HClO₃^-

ClO₂^-2

ClO₃^-

ClO^2-

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

IO₄^-

IO₄^-2

IO₃^-

IO₃^2-

HIO₃^-

General Chemistry Online! Quiz