1. Name the ions
CrOPS
If the element joined with oxygen(s) is one of Cr, P, or S its “ate” version has 4 O’s
If not…it has three

2. Prefixes and suffixes indicate how many oxygen atoms are with the “root word” element
Hypo________ite has two less than “____ate”
_____ite has one less than “_____ate”
_____ate is the most common
Per______ate has one more than “____ate”
_______ide means just the element, no oxygen

3. Chlorine Chlorate Chlorite Hypochlorite Perchlorate
ClO3- ClO2- ClO- ClO4-

4. Phosphorus PO4-3 PO3-3 HPO4-2 H2PO4- Phosphate Phosphite
Hydrogen phosphate
Dihydrogen phosphate

5. CrO42-
chromate

6. NO3-
Nitrate

7. NO2-
Nitrite

8. CO3-
carbonate

9. SiO32-
Silicate

10. SO42-
Sulfate

11. MnO42-
Permanganate

12. HCO3-
Hydrogen carbonate

13. Sulfite
SO32-

14. Exceptions ammonium acetate hydroxide cyanide oxalate dichromate NH4+
C2H3O2-
OH-
CN-
C2O42-
Cr2O72-

15. QUIZ!