1. Properties and Indicators
Acids & Bases
Properties and Indicators

2. Properties ACIDS BASES electrolyte electrolyte sour taste bitter taste
sticky feel
slippery feel
turn litmus red
turn litmus blue
react with acids to form water and a salt (ionic compound)
react with bases to form water and a salt (ionic compound)

3. Acids Affect Indicators:
Blue litmus paper turns red in contact with an acid. 3

4. Red litmus paper turns blue in contact with a base.
Bases affect indicators:
Red litmus paper turns blue in contact with a base.
Phenolphthalein turns pink in a base. 4

5. Examples
ACIDS: Most citrus fruits, tea, battery acid, vinegar, milk, soda, apples.
BASES: Common household bases include baking soda, lye, ammonia, soap, and antacids. . 5

6. pouvoir hydrogène (Fr.)
pH Scale 14 7
INCREASING
ACIDITY
INCREASING
BASICITY
NEUTRAL
pH is the negative logarithm of the hydrogen ion concentration
pH = -log[H+]
pouvoir hydrogène (Fr.)
“hydrogen power”

7. pH Scale 7

8. pH of Common Substances
pH Scale
pH of Common Substances

9. Titration
standard solution
unknown solution
Titration
Analytical method in which a standard solution is used to determine the concentration of an unknown solution.

10. Titration Equivalence point (endpoint)
Point at which equal amounts of H+ and OH- have been added.
Determined by…
indicator color change
dramatic change in pH

12. Acids Bases H+ ions- Hydrogen ions OH- ions- hydroxide ions
H3O+ ions- Hydronium ions
Proton donor Electron donor

15. Molarity Molarity= moles of a substance/liter water Molarity= M
Ex. 18M Sulfuric acid means that there are 18 moles of sulfuric acid per one liter of water
Molarity deals with liquid solutions