Presentation is loading. Please wait.

Presentation is loading. Please wait.

Ch. 15 and 6 Polyatomic Ions. Polyatomic Ions Tightly bound groups of atoms that behave as a unit and carry a charge. Ammonium NH 4 + Cyanide CN - Sulfite.

Similar presentations


Presentation on theme: "Ch. 15 and 6 Polyatomic Ions. Polyatomic Ions Tightly bound groups of atoms that behave as a unit and carry a charge. Ammonium NH 4 + Cyanide CN - Sulfite."— Presentation transcript:

1 Ch. 15 and 6 Polyatomic Ions

2 Polyatomic Ions Tightly bound groups of atoms that behave as a unit and carry a charge. Ammonium NH 4 + Cyanide CN - Sulfite SO 3 2- Examples:

3 Common Polyatomic Ions with a -1 charge ClO -1 hypochlorite ClO 2 -1 chlorite ClO 3 -1 chlorate ClO 4 -1 perchlorate CN -1 cyanide MnO 4 -1 permanganate NO 3 -1 nitrate NO 2 -1 nitrite

4 -1 polyatomic ions cont. OH -1 hydroxide HCOO -1 formate HCO 3 -1 hydrogen carbonate HSO 3 -1 hydrogen sulfite HSO 4 -1 hydrogen sulfate CH 3 COO -1 or C 2 H 3 O 2 -1 acetate

5 -2 polyatomic ions C 2 O 4 -2 oxalate CO 3 -2 carbonate Cr 2 O 7 -2 dichromate CrO 4 -2 chromate SO 4 -2 sulfate SO 3 -2 sulfite

6 -3 polyatomic ion PO 4 -3 phosphate PO 3 -3 phosphite

7 +1 polyatomic ions NH 4 +1 ammonium H 3 O +1 hydronium

8 B.Examine Relationships A.Most end in –ite / -ate Trick to remember: The bigger number ate the little number! Polyatomic Ions SO 4 2- Sulfate SO 3 2- Sulfite

9 The big number ate the little number! PO 4 3- Phosphate PO 3 3- Phosphite NO 3 - Nitrate NO 2 - Nitrite

10 Writing Formulas for Ternary Ionic Compounds A. Contain a polyatomic ion B. Same rules as for binary ionic compounds. One addition – Use parenthesis if there is more than one polyatomic ion Examples: Calcium Hydroxide – Calcium - Ca 2+ OH - –Hydroxide – Formula for compound – Ca(OH) 2

11 Boron acetate B 3+ C 2 H 3 O 2 -1 B(C 2 H 3 O 2 ) 3 Magnesium Dichromate Mg +2 Cr 2 O 7 -2 Mg 2 (Cr 2 O 7 ) 2 MgCr 2 O 7

12 Examples (cont.) Magnesium Nitrate – Magnesium – Mg 2+ – Nitrate - ???? – Write the formula for the compound

13 Practice Problems Write formulas for the following ternary ionic compounds: a.Calcium Carbonate b.Potassium Sulfate c.Barium Nitrite d.Magnesium Phosphate CaCO 3 K 2 SO 4 Ba(NO 2 ) 2 Mg 3 (PO 4 ) 2

14 Naming Ternary Ionic Compounds Same rules as for naming binary ionic compounds: – Name the cation – Use a Roman numeral if necessary – Name the anion – Do not use the word “ion” in the compound name

15 Practice Problems: Name the following ternary ionic compounds: a.NaCN b.KClO c.Li 2 SO 3 d.CaC 2 O 4 e.Al(OH) 3 f.Sn 3 (PO 4 ) 2 Sodium cyanide Potassium hypochlorite Lithium sulfite Calcium oxalate Aluminum hydroxide Tin (II) phosphate

16 Due at the end of class, Completed Ionic Compounds- Polyatomic Ions Due at the end of class, Completed ClOHSO 4 PO 4 NO 3 Zn +2 NH 4 K Ca Fe


Download ppt "Ch. 15 and 6 Polyatomic Ions. Polyatomic Ions Tightly bound groups of atoms that behave as a unit and carry a charge. Ammonium NH 4 + Cyanide CN - Sulfite."

Similar presentations


Ads by Google