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Home :Companion Notes :Compounds :Polyatomic ionsPrint | Comment

Quiz
1. NaClO3 has been used in herbicides and in explosives. The name of this compound is:
sodium chloratesodium chloridesodium chloride trioxidesodium perchloratesodium chlorite
2. Iodate ion is used as a disinfectant. The formula of the iodate ion is
IO32-HIO3-IO4-IO3-IO4-2
3. 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+O3-O2-O2-O22-
4. 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-OH-HO2-HO2+
5. 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:
HCO3-CO3-CO32-CO2-CO22-
6. Phosphate ion is a basic building block of minerals, bones, teeth, and DNA. The formula of the phosphate ion is:
PhO2-2PO43-PO3-HPO4-2PO42-
7. Perbromate ion is extremely unstable for quantum mechanical reasons. If it existed, the formula of the perbromate ion could be:
HBrO3-BrO32-BrO4-BrO4-2BrO3-
8. Ammonium nitrate is used as a fertilizer by farmers and as an explosive by terrorists. The formula of ammonium nitrate is
AmNO2NH3NO3NH3NO2NH4NO3(NH4)2NO2
9. Sodium bicarbonate is "baking soda", the active ingredient in many antacids. The formula of the bicarbonate ion is:
(CO3)24-HCO3-H2CO3-CO32- HCO32-
10. Nitrite ion is used in bleaching, dyeing and printing fabrics. The formula of the nitrite ion is:
NO42-NO2-N2O3-2NO3-HNO4-
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Copyright © 1997-2005 by Fred Senese
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Last Revised 06/11/07.URL: http://antoine.frostburg.edu/chem/senese/101/compounds/polyatomic-quiz.shtml