1. Acids and bases

2. Learning goals We are learning to identify and name acids and bases.
We are learning the properties of acids and bases.

3. Properties of acids HCl H+ + Cl-
Sour-tasting and water-soluble ionic compounds.
Extremely reactive compounds – corrode metals.
Good conductors of electricity since they contain ions.
Contain hydrogen that, when dissolved in water, release H+ ions:
HCl
H Cl-
**The hydrogen tips us off that the compound is an acid.

4. Naming binary acids
If acid made of only hydrogen and one other element:
use prefix “hydro”
stem of element
suffix “ic”
word “acid”
e.g. HCl: hydrochloric acid

5. oxyacids OXY – meaning they contain oxygen
ACID – meaning they contain hydrogen
Acids containing our polyatomic ions!

6. Naming oxyacids “-ate” ending changes to “-ic acid” BrO3: bromate
HBrO3 : bromic acid
one less oxygen
“-ite” ending changes to “-ous acid”
BrO2: bromite
HBrO2 : bromous acid

7. Naming oxyacids two less oxygens prefix “hypo” and “-ous acid” ending
HBrO: Hypobromous Acid
one more oxygen
prefix “per” and “-ic acid” ending
BrO4 : perbromate
HBrO4: perbromic acid

8. Common acids Common Name Formula Source/Use vinegar(acetic acid)
HC2H3O2(aq)
salad dressing
citric acid
HC6H7O7(aq)
oranges
ascorbic acid
HC6H7O6(aq)
vitamin C
lactic acid
HC3H5O3(aq)
sour milk
carbonic acid
H2CO3(aq)
carbonated drinks
sulphuric acid
H2SO4(aq)
car batteries

9. Properties of bases Bitter tasting, eater soluble
Feel slippery; good conductors of electricity
Most bases contain the hydroxide ion
NaOH  Sodium hydroxide

10. Common bases Common Name Formula Use sodium hydroxide NaOH(aq)
drain cleaner
potassium hydroxide
KOH(aq)
soap
aluminium hydroxide
Al(OH)3(aq)
antacids
ammonium hydroxide
NH4OH(aq)
window cleaner
sodium bicarbonate
NaHCO3(aq)
baking soda

11. Learning goals We are learning to identify and name acids and bases.
We are learning the properties of acids and bases.

12. Please complete
Naming Acids funsheet
Textbook p271 #1-5