1. 3.2 Acid and
Bases

2. Acids and their properties
An acid is any compound that increases the number of hydronium ions
Hydronium forms when and H+ separates from an acid and bonds with water = H3O+

3. Acids have a Sour Taste Lemon, limes, and other citric fruit = Sour
Most acids are poisonous
Many acids are corrosive = destroy body tissue, clothing, and many other things.

4. Acids change colors in indicators
A substance that changes color in the presences of an acid or base is called an indicator.
Water and Turns yellow = ACID
Bromthymol blue

5. Acids react with metals
Acids and metals = H+ gas
2HCl + Zn  H2 + ZnCl2
(What type of reaction did you learn this was? AB + C  A + CB)

6. Acids conduct electric current
Acids in water produce ions
These ions allow the solution to conduct electricity.
Like in this car battery.

7. Uses of Acids Sulfuric Acid Hydrochloric acid Help make paper Paint
Detergents
fertilizers
Hydrochloric acid
Swimming pool sanitizer
In your stomach— digests food
Hydrofluoric Acid
Etch glass

8. Uses of Acids Citric Acid & Ascorbic Acid (vitamin C)
Orange Juice
Carbonic acid phosphoric acid
Help give flavor to soft drinks

9. Bases and their properties
A base is any compound that increases the number of hydroxide ions (OH-) when dissolved in water.
Example:
NaOH  Na+ + OH- in water

10. Bases Bases have a bitter flavor Bases have a slippery feel Example:
Soap
Be careful, many bases are corrosive!

11. Bases

12. Bases Bases change color in indicators
Bromthymol Blue + a base  Dark Blue

13. Bases
Because bases increase OH- ions, bases are conductors of electric currents.

14. Uses of bases NaOH Make soap Paper Oven cleaner Unclog sinks
Magnesium Hydroxide/Aluminum Hydroxide
antacids

15. Universal Indicator
a pH indicator tells us if a solution is an acid 1-6.9, Neutral 7, or Basic
pH scale depends on H+ concentration