Science 4.9 - Acidification Lab
Our Atmosphere Gases
Carbon Dioxide |
Sulfur Dioxide |Creates an Acidic Solution
Hydrogen Chloride |
Limestone and Sinkholes
Limestone:
- Porous (holds water)
- Soft
- Soluble in H2O (Carbonic Acid)
Florida Sinkholes:
- Lots of Limestone
- Water underground (aquifer)
- Once covered with with ocean --> soft calcium deposits (dead animals)
Sulfuric Acid Notes
- Discovered in 8th century by alchemist ---> Alchemy (Chemistry)
Uses
- Lead Acid Batteries (cars)
- Fertilizers
- Steel Industry ---> Prevents rust corrosion
- Dried fruit production (hydrotropic)
Magnesium Carbonic and Acid
Magnesium Carbonic + Acid = Carbon Dioxide = Dense Gas
- Test Tube (Upright) = CO2 is dense, sinks down, can't escape
- Test Tube (Down) = CO2 is dense, sinks down, escapes
Magnesium and Acid
Magnesium and Acid = Hydrogen = Less Dense Gas
- Test Tube (Upright) = H is less dense, floats up, escapes
- Test Tube (Down) H is less dense, floats up, can't escape
"Pop" Sound - Magnesium and Acid Test Tube
- Ignited gas rushes out
- Friction against the gas causes the popping sound
Phenol Red
PH Indicator
- Red: Basic (Good)
- Clear: Acid (Bad)
Acidification
- Phenol Red changes as Carbon Dioxide is added into Water
- Carbon Dioxide turns to carbonic acid lowering the PH of the Water
- Calcium Tablet is more soluble inside water with the straw
- Carbonic Acid lowers PH so it dissolves calcium faster
Ocean Acidification
Normal PH is 8.1 - 8.4
- Oceans PH has decreased by 0.1 (about 25%)
- Lower Ocean PH means sea animals with shells will not be able to make a shell. (EX: Crab, Shrimp, Clam, Etc.)