Upload
sherilyn-mcdonald
View
225
Download
2
Tags:
Embed Size (px)
Citation preview
Binary compounds-contain 2 elements1) metal w/ charge and non-metal (Type I)2) Transition metal and non-metal (Type II)3) two non-metals (Type III)
1) write element symbol and charge 2) net charges must equal zero 3) add subscripts if charges don’t add up
to zero Barium sulfide Magnesium phosphide
How to write formula from name 1) write element symbol and charge 2) net charges must equal zero 3) add subscripts if charges don’t add up
to zero Lead (II) oxide Iron (III) sulfide Roman numeral= charge of transition
metal
Write name from formula• Need to figure out the charge• Include roman numeral in name FeCl2 (__x 1) + (-1 x 2)= 0 Fe+2
Iron (II) chloride ic- higher charge Fe+3 Ferric ous- lower charge Fe+2 Ferrous Example 4.2, 4.3
1) name the first element by its element name
2) second element is named as though it were an anion (ide ending)
3) prefixes are used to denote the number of atoms (Table 4.3 pg 95)
4) mono is never used for the first element Example 4.4, 4.5
Polyatomic ion- charged entities composed of several atoms bound together
Oxyanions- SO3 and SO4
ite ate hypo-less than per- more than ClO- hypochlorite ClO2 – chlorite ClO3 – chlorate ClO4 - perchlorate
Must know - name of polyatomic ion - charge of polyatomic ion - recognize polyatomic ion NH4C2H3O2
FeSO4
Example 4.7 more than one polyatomic ion or
polyatomic ions with a subscript require parentheses
(NH4)2SO4
Fe3(PO4)2
Acids- when dissolved in H2O, they produce H+ ions
Sour tasteNaming 1) if the anion does not contain O2 then use
hydro prefix, element root + ic (ex: HCl) 2) if O2 is in the anion, then look at the
ending of the polyatomic ion (HNO3 and HNO2)
ite- ous acid ending ate- ic
1. HF 9. Chlorous Acid 10. HClO3
2. HBr 11. HClO4
3. H3PO4 12. carbonic acid
4. HNO2 13. HC2H3O2
5. Nitric acid 14. HClO6. H2SO3 15. HI7. H2SO4