1. Acids and Bases

2. Acids release hydrogen ions (H+) when dissolved in water
has a pH less than 7
tastes sour
burns or stings
turns pH indicators red

3. Penny in Nitric Acid (HNO3)

4. Penny in Nitric Acid (HNO3)

5. Bases release hydroxide ions (OH-) when dissolved in water
has a pH greater than 7
tastes bitter
feel slippery
turns pH indicators blue

6. Acids and Bases neutralize each other when mixed
buffers keep the pH of a solution from changing

7. pH Scale acids and bases are measured on the pH scale
the scale ranges from
acid less than 7
base greater than 7
neutral 7
further from 7, stronger it gets

8. pH Scale

9. pH Scale orange juice (3.5) toothpaste (8.0) stomach acid (1.0)
pure water (7.0)
bleach (12.5)
vinegar (2.5)
hand soap (8.5)
substance pH
acid/base
stomach acid 1
acid
vinegar
2.5
orange juice
3.5
pure water 7
neutral
toothpaste 8
base
hand soap
8.5
bleach
12.5

10. Poem Lemons, sodas and battery acids These are examples of sour acids
Bleach, Chalk and soap for faces
These are examples of bitter bases