1. Naming Compounds Unit 2 Chemistry

2. Ionic bonds What is an ionic bond? Quick rule: never use capital letters when writing names

3. Why name compounds? So we know what is in products and what could be dangerous Compounds found at home = chemical names  Bleach = sodium hypochlorite  Baking soda = sodium bicarbonate  Antifreeze = ethylene glycol  Table salt = sodium chloride  Vinegar = acetic acid  Nail polish remover = acetone Glass cleaner = ammonia Toothpaste = sodium fluoride

4. Ionic Bond naming An ionic bond is between a metal and non-metal  First write the cation (metal) first and do not change the name at all  Then write the anion (non-metal) second but add the suffix –ide to the name Ex oxide, carbide, hydride, sulfide, chloride

5. Examples NaCl-  sodium chloride LiBr-  lithium bromide K 2 O-  potassium oxide BeF 2 -  beryillium flouride

6. Ionic bonds with polynomials If there are more than two elements in the bond then one is a polynomial The polynomial is almost always the anion except for NH 4 - ammonia First write the metal name unchanged Next write the polynomial name unchanged  You find the names of polynomials from the back of the table

7. Examples NaOH-  sodium hydroxide CaCO 3 -  calcium carbonate MgNO 3 -  magnesium nitrate

8. Easy right?  some metals have more than one charge making it more complicated  Ex: Fe can have +3 or +2 Mn can have +2 or +4 V can have +5 or +4

9. When a metal has more than one charge you need to determine what the charge is:  Ex iron and oxygen can be FeO or Fe 2 O 3

10. Finding charge The easiest way is to do the ‘reverse’ criss cross method Fe 2 O 3 :  So Fe has a +3 charge and O has a -2 charge  The charge of the metal is then put in roman numerals directly behind the metal  iron (III) oxide

11. Examples V 2 O 5 :  V +5, O -2  vandium (V) oxide CuCl:  Cl -1, Cu +1  copper (I) chloride

12. Exception You need to double check that the anion has the correct charge on it  FeO: O is -2 so Fe has to be +2  iron (II) oxide

13. Assignment Ionic Naming worksheet