1. 1 4.4 Polyatomic Ions Chapter 4 Compounds and Their Bonds Copyright © 2009 by Pearson Education, Inc.

2. 2 A polyatomic ion is a group of atoms. has an overall ionic charge. Some examples of polyatomic ions are NH 4 + ammoniumOH − hydroxide NO 3 − nitrateNO 2 − nitrite CO 3 2− carbonatePO 4 3− phosphate HCO 3 − hydrogen carbonate (bicarbonate) Polyatomic Ions

3. 3 Some Compounds with Polyatomic Ions Copyright © 2009 by Pearson Education, Inc.

4. 4 The names of common polyatomic anions end in ate. NO 3 − nitratePO 4 3− phosphate with one oxygen less end in ite. NO 2 − nitritePO 3 3− phosphite with hydrogen attached use the prefix hydrogen (or bi). HCO 3 − hydrogen carbonate(bicarbonate) HSO 3 − hydrogen sulfite (bisulfite) Some Names of Polyatomic Ions

5. 5 Names and Formulas of Common Polyatomic Ions

6. 6 The positive ion is named first, followed by the name of the polyatomic ion. NaNO 3 sodium nitrate K 2 SO 4 potassium sulfate Fe(HCO 3 ) 3 iron(III) bicarbonate or iron(III) hydrogen carbonate (NH 4 ) 3 PO 3 ammonium phosphite Naming Compounds with Polyatomic Ions

7. Guide to Naming Compounds with Polyatomic Ions 7

8. 8 Some Compounds with Polyatomic Ions

9. 9 Match each formula with the correct name. A. MgS1) magnesium sulfite MgSO 3 2) magnesium sulfate MgSO 4 3) magnesium sulfide B. Ca(ClO 3 ) 2 1) calcium chlorate CaCl 2 2) calcium chlorite Ca(ClO 2 ) 2 3) calcium chloride Learning Check

10. 10 Match each formula with the correct name. A. MgS3) magnesium sulfide MgSO 3 1) magnesium sulfite MgSO 4 2) magnesium sulfate B. Ca(ClO 3 ) 2 1) calcium chlorate CaCl 2 3) calcium chloride Ca(ClO 2 ) 2 2) calcium chlorite Solution

11. 11 Learning Check Name each of the following compounds: A.Mg(NO 3 ) 2 B.Cu(ClO 3 ) 2 C.PbO 2 D.Fe 2 (SO 4 ) 3 E.Ba 3 (PO 3 ) 2

12. 12 Solution Name each of the following compounds: A.Mg(NO 3 ) 2 magnesium nitrate B.Cu(ClO 3 ) 2 copper(II) chlorate C.PbO 2 lead(IV) oxide D.Fe 2 (SO 4 ) 3 iron(III) sulfate E.Ba 3 (PO 3 ) 2 barium phosphite

13. 13 Writing Formulas with Polyatomic Ions The formula of an ionic compound containing a polyatomic ion must have a charge balance that equals zero (0). Na + and NO 3 − -> NaNO 3 with two or more polyatomic ions has the polyatomic ions in parentheses. Mg 2+ and 2NO 3 − -> Mg(NO 3 ) 2 subscript 2 for charge balance

14. 14 Select the correct formula for each. A. aluminum nitrate 1) AlNO 3 2) Al(NO) 3 3) Al(NO 3 ) 3 B. copper(II) nitrate 1) CuNO 3 2) Cu(NO 3 ) 2 3) Cu 2 (NO 3 ) C. iron(III) hydroxide 1) FeOH2) Fe 3 OH3) Fe(OH) 3 D. tin(IV) hydroxide 1) Sn(OH) 4 2) Sn(OH) 2 3) Sn 4 (OH) Learning Check

15. 15 Select the correct formula for each. A. aluminum nitrate 3) Al(NO 3 ) 3 B. copper(II) nitrate 2) Cu(NO 3 ) 2 C. iron(III) hydroxide 3) Fe(OH) 3 D. tin(IV) hydroxide 1) Sn(OH) 4 Solution

16. 16 Learning Check Write the correct formula for each. A.potassium bromate B.calcium carbonate C.sodium phosphate D.iron(III) oxide E.iron(II) nitrite

17. 17 Solution Write the correct formula for each. A.potassium bromateKBrO 3 B.calcium carbonateCaCO 3 C.sodium phosphateNa 3 PO 4 D.iron(III) oxideFe 2 O 3 E.iron(II) nitriteFe(NO 2 ) 2

18. 18 Flowchart for Naming Ionic Compounds

19. 19 Learning Check Name the following compounds: A. Ca 3 (PO 4 ) 2 B. FeBr 3 C. Al 2 S 3 D. Zn(NO 2 ) 2 E. NaHCO 3

20. 20 Solution Name the following compounds: A. Ca 3 (PO 4 ) 2 Ca 2+ PO 4 3− calcium phosphate B. FeBr 3 Fe 3+ Br − iron(III) bromide C. Al 2 S 3 Al 3+ S 2− aluminum sulfide D. Zn(NO 2 ) 2 Zn 2+ NO 2 − zinc nitrite E. NaHCO 3 Na + HCO 3 − sodium hydrogen carbonate or sodium bicarbonate

21. 21 Learning Check Write the formulas for the following: A. calcium nitrate B. iron(II) hydroxide C. aluminum carbonate D. copper(II) bromide E. lithium phosphate

22. 22 Solution Write the formulas for the following: A. calcium nitrateCa 2+, NO 3 − Ca(NO 3 ) 2 B. iron(II) hydroxideFe 2+, OH − Fe(OH) 2 C. aluminum carbonateAl 3+, CO 3 2− Al 2 (CO 3 ) 3 D. copper(II) bromide Cu 2+, Br − CuBr 2 E. lithium phosphateLi +, PO 4 3− Li 3 PO 4