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Review Questions: Chemical Nomenclature - Naming Compounds

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Review Questions: Chemical Nomenclature - Naming Compounds Review Questions: Chemical Nomenclature - Naming Compounds 1. What are binary compounds? Compounds that contain only two different elements. 2. When naming binary compounds that contain a metal and a nonmetal, is the anion or cation named first? The cation. Always start with the positive ion (located on the left side of the periodic table). 3. When naming binary compounds that contain a transition metal, a Roman numeral is often included in the name. What does the Roman numeral represent and when must it be included in the name of the compound? The charge on the ion; NOT the number of atoms found in the compound. 4. Why are prefixes included in the name of binary compounds that contain two nonmetals? Because they can combine in various proportions; the prefix gives the number of atoms found in the compound; since two nonmetals “share electrons” they do NOT become ions and the ratio of atoms is NOT based on their charges. 5. What number do the following prefixes represent? di- = ___2____ mono- = ____1____ penta- = ____5____ tetra- = ____4____ 6. What is a polyatomic ion? A group of atoms with a positive or negative charge. 7. What is the chemical formula for the chromate and dichromate polyatomic ions? -2 -2 Chromate ion = CrO Dichromate ion = Cr2O7 8. What is the chemical formula for the phosphate and phosphite polyatomic ions? -3 -3 Phosphate ion = PO4 Phosphite ion = PO3 49 9. Select the correct name for each formula given below and place the correct answer in the last column. Formula A B C Answer 1. KBr phosphorous bromide potassium bromate potassium bromide ___C___ 2. BaSO4 barium sulfate barium sulfide barium sulfite ___A___ 3. Cu2O dicopper oxide copper (II) oxide copper (I) oxide ___C___ 4. Fe2(SO4)3 iron (II) sulfate iron (III) sulfate iron (II) sulfite ___B___ 5. N2O4 nitrogen oxide nitrogen tetraoxide dinitrogen tetraoxide ___C___ 6. K3PO4 potassium phosphate potassium phosphide calcium phosphate ___A___ 7. Al2O3 aluminum (II) oxide aluminum oxide dialuminum trioxide ___B___ 8. NH4Cl nitrogen hydrogen chloride ammonium chlorite ammonium chloride ___C___ 9. Br2O3 bromium oxide dibromium trioxide bromium (II) oxide (III) ___B___ 10. SrS strontium sulfate strontium (II) sulfide strontium sulfide ___C___ 11. ZnSO4 zinc sulfide zinc sulfate zinc sulfite ___B___ 12. Ag2O silver oxide disilver oxide silver (II) oxide ___A___ 13. Na2CrO4 sodium dichromate sodium chromate ammonium chromate ___B___ 14. Ca(C2H3O2)2 calcium oxalate carbon acetate calcium acetate ___C___ 15. Cu3(PO4)2 copper (II) phosphate copper (III) phosphate copper phosphite ___A___ 16. KI potassium iodite potassium iodate potassium iodide ___C___ 17. Cu(OH)2 copper hydroxide copper dihydroxide copper (II) hydroxide ___C___ 18. Pb(NO2)2 lead (II) nitrate lead (II) nitrite phosphorous nitrite ___B___ 19. CrBr3 chromium (III) bromite chromium bromide chromium (III) bromide ___C___ 20. LiClO2 lithium chloride lithium chlorite lithium chlorate ___B___ 50 10. Select the correct formula for each chemical name given below and place the correct answer in the last column. Name A B C Answer 1. Barium nitrate Ba(NO3)2 BaNO3 Ba3N2 ___A____ 2. Tin (IV) bromide SnBr4 SnBr3 SnBr2 ___A____ 3. Potassium iodate K2IO3 KIO3 KIO4 ___B____ 4. Sodium dichromate Na(CrO4)4 Na2CrO4 Na2Cr2O7 ___C____ 5. Nickel (III) bromide NiBr3 Ni3Br NiBrO3 ___A____ 6. Copper (II) sulfate Cu3S2 Cu2(SO4)3 CuSO4 ___C____ 7. Aluminum sulfate AlSO4 Al2(SO4)3 Al2SO4 ___B____ 8. Calcium oxalate CaC2O4 Ca(C2O4)2 CaCO3 ___A____ 9. Zinc sulfate ZnS ZnSO4 ZnSO3 ___B____ 10. Ammonium nitrate NH4NO3 NH4NO2 NH4N ___A____ 11. Potassium chlorate KCl KClO3 KClO2 ___B____ 12. Tin (II) sulfide SnS TiS Sn2S ___A____ 13. Iron (III) chloride Fe3Cl FeCl3 FeClO3 ___B____ 14. Silver chromate Si2CrO4 Ag2CrO4 AgCrO4 ___B____ 15. Magnesium carbonate MgCO3 Mg(HCO3)2 Mg2C ___A____ 16. Mercury (II) oxide Hg2O HgO HgO2 ___B____ 17. Barium hydroxide BaOH Ba(OH)2 Ba(OH)3 ___B____ 18. Chromium (II) sulfide Cr2S CrS CrSO4 ___B____ 19. Lead (IV) nitrite Pb4N3 Pb(NO3)4 Pb(NO2)4 ___C____ 20. Dinitrogen trioxide N3O2 N2O3 Ni2O3 ___B____ 51 52 .
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