1. ready
Acids
and
Bases

2. pH Scale

3. pH Scale pH is a logarithmic scale “The power of hydrogen”
The scale goes from 0-14
A substance with a pH of 6 is ten times more acidic than one with a pH of 7
There are strong acids and bases but concentration determines how dangerous
All substances can be listed as acid, base, or neutral

4. ACIDS Release H+ ions in water (sometimes called protons)
These ions (protons):
conduct electricity
dissolve metals
taste sour
The more readily an acid releases ions, the stronger it is and better conductor

5. BASES Takes more protons from a solution than it releases
May produce hydroxide ions (OH-) in solution
Slippery
Can be viewed as the chemical “opposite” of an acid

6. hydrochloric acid
tomato juice
blood
limewater
gastric juices
coffee
baking soda
coca cola
sodium hydroxide
milk of magnesia
wine
toothpaste
vinegar
pure water
oven cleaner
bleach
lemon juice
rain water
salty water
urine

7. ACIDIC ALKALINE NEUTRAL INDICATORS
When an acid is dissolved in water, what kind of solution could it be called ?
ACIDIC
When a base is dissolved in water, what kind of solution could it be called ?
ALKALINE
When a solution is neither acidic nor alkaline, what could it be called ?
NEUTRAL
What name is given to chemicals which can show whether a solution is acidic, alkaline or neutral ?
INDICATORS

8. NEUTRALIZATION When an acid reacts with a base it is called
In a neutralization reaction, a salt and water are formed
Universal indicator can go any colour in the rainbow

9. Hydrangeas (natural indicators)

10. pH- Universal Indicator pH- Hydrion Paper (litmus) Conductivity
Solution
pH- Universal Indicator
pH- Hydrion Paper (litmus)
Conductivity
(high, medium, low)
Lemon Juice
Baking soda solution
Vinegar
Ammonia
Distilled Water