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Home :Companion Notes :Compounds :Polyatomic ionsPrint | Comment

Quiz
1. 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:
pernitratenitratesupernitratehyponitritenitrite
2. 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:
HO2-HO2+HO2-OH-HO3-
3. Chlorite compounds are extremely explosive when they come into contact with combustible material. The formula of the chlorite ion is:
ClO2-2ClO2-ClO3-HClO3-ClO2-
4. Hard water contains high concentrations of calcium ions. The water is "softened" by treatment with carbonate ions, which precipitates the calcium as insoluble calcium carbonate. The formula of carbonate ion is:
CO32-HCO3-CO2-CO22-CO3-
5. Sodium aluminate is used in fabric printing processes. If the formula is NaAlO2, the charge on the aluminate ion must be:
+2-2+1-10
6. Veterinarians administer an 0.2 percent potassium permanganate solution to cows and horses as an antidote for plant alkaloid poisoning. A bottle that contains potassium permanganate solution might be labelled:
K2MnO3KMnO3K2MnO4KMgO4KMnO4
7. 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
BrO4-BrO3-BrO32-HBrO3-BrO4-2
8. Nitrite ion is used in bleaching, dyeing and printing fabrics. The formula of the nitrite ion is:
NO3-NO42-N2O3-2HNO4-NO2-
9. Hypochlorite ion is the active ingredient in Chlorox bleach. The formula of the hypochlorite ion is:
ClO-ClO2-2ClO2-HClO-ClO3-
10. NaClO4 is used to manufacture explosives. NaClO is the active ingredient in Chlorox bleach. The names of the anions in these compounds are, respectively,
chlorate and chloritetetroxychlorine and monoxychlorine
hyperchlorite and hypochloritequadrochloroxide and monochloroxide
exochloride and endochlorideperchlorate and hypochlorite
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General Chemistry Online! Quiz

Copyright © 1997-2005 by Fred Senese
Comments & questions to fsenese@frostburg.edu
Last Revised 06/11/07.URL: http://antoine.frostburg.edu/chem/senese/101/compounds/polyatomic-quiz.shtml