4.9 Science Study Guide
Acidification Lab
Acidification Post Lab
-Phenol Red changes color as you add CO2 (Carbon Dioxide) into the Water-The CO2 turns to carbonic acid lowering the Ph of the Water
-Calcium tablet is more soluble in cup with the straw
-Because the carbonic acid lowers the Ph + Dissolves calcium faster
Experimental Errors
-Don't bubble Water long enough
- 2 cups don't have same amount of Water
-Less water when using straw
-Put CO2 into both cups
Ocean Acidification
-Normal ocean's Ph is 8.1-8.4
Oceans Ph has decreased 0.1 (about 25%)
-Lower ocean means sea animals with shells will not be able to make a shell (shells are made from calcium) Animals include: Crabs, shrimps, clams, etc.
Two Gases Lab
Sulfuric Acid Notes
- Discovered in the 8th Century by Alchemist= Alchemy ("Chemistry")
-Alchemists wanted to make gold out of rocks
Uses:
-Lead acid batteries (cars)
-Fertilizers
-Steel industry = Prevents rust corrosion
-Dried fruit production (hydrotropic)
Limestone/Sinkholes
Florida Sinkholes occur because:
-Lots of limestone
-Water underground (Aquafer= Water underground)
-Once covered with ocean= soft calcium deposits (dead animals)