1. Naming Acids Objectives: To learn how the anion composition determines the acid’s name.

2. What is an Acid? An acid is a substance that when dissolved in water, produces the H + ion. These substances, which are called acids, were first recognized by the sour taste of their solutions.

3. Acids make hydrogen ions in water When acids are put into water they split into ions Any compound that makes the H + ion is considered an acid

4. How do I know if a compound is an acid? The best way is to look at the formula of a couple of acids and see what they have in common. Common acids include: HClH 2 SO 4 H 3 PO 4 HFH 2 S What do they have in common? They start with the element hydrogen

5. Exceptions H 2 O is not an acid H 2 is the element hydrogen. It isn’t a acid either. On your paper circle the compounds that are acids

6. Acids with ions ending in -ide All acids have anions. Identify the anions that are contained in the acids below. HCl _______________________ HBr ____________________ HCN ____________________

7. Binary Acids List the rules for naming acids of this type (ions that end in –ide) 1. Say hydro- 2. Then say the stem Cl - chlor Br - -brom F - -fluor S 2- -sulfur and so on … 3. Then say acid

8. How are acids named? Start by observing that there are two different kinds of acids. -ide ending-ate or -ite ending

9. Naming acids without oxygen in them Name HCl HCl Hydrochloricacid Name HBr HBr Hydrobromicacid

10. Identify the polyatomic ions that are contained in the acids below HNO 3 Nitrate HNO 2 Nitrite HClO 3 Chlorate HClO 2 Chlorite

11. Separate the ions into -ate and -ite HNO 3 Nitrate HNO 2 Nitrite HClO 3 Chlorate HClO 2 Chlorite

12. When naming acids that contain polyatomic ions whose names end in –ate 1st change the –ate to ______________ and then say _________________ When naming acids that contain polyatomic ions whose names end in –ite 1st change the –ite to ______________ and then say _________________

13. Name the acids below using the rules I just taught you. HNO 3 ________________________ HNO 2 __________________________ HClO 3 _________________________ HClO 2 _________________________

14. Name the acids HCN hydrocyanic acid H 2 C 2 O 4 Oxalic acid

15. Name the acids below using the rules I just taught you. HCl H 2 CO 3 HNO 2 HC 2 H 3 O 2 HBr

16. H 2 SO 4 and H 3 PO 4 SO 4 2- is sulfate. PO 4 3- is phosphate. However, H 2 SO 4 is sulfuric acid not sulfic acid and H 3 PO 4 is phosphoric not phosphic acid.

17. Here are some polyatomic ions that are not on page 100 BrO 4 - Perbromate BrO 3 - Bromate IO 3 - is Iodate PO 3 3- is phosphite C 2 O 4 2- is oxalate