Science Study Guide
By Austin Dear
4.9- Acid Rain and Global Warming
- When gases are dissolved in water the solutions change substantially
- These solution are called acidic solutions
- Raindrops dissolve carbon dioxide as they pass through the atmosphere
- The raindrops for an acidic solution known as carbonic acid
- Carbon Dioxide is produced and added to the atmosphere when coal, oil, wood, and gasoline are burned
- An increase in carbon dioxide in the atmosphere is closely relate to an increase in the average temperature near the surface of the earth
- This increase in average temperature is called global warming
- Water falling to the earth that contains dissolved sulfur dioxide is called acid rain
4.10 Drinking Water
- Most people get their drinking water from wells, rivers, or lakes.
- The concentration of substance dissolved in drinking water are very low.
- Some examples of substances that are not very toxic, but affect the taste of water are: Sodium Chloride, iron chloride, and calcium carbonate
Two Gases Lab
Experimental Errors:
- Not waiting 30 sec
- Unstopper before inverting
- Break surface H20 with test tube
- Don't collect full test tube of gases
- Air bubble in test tube
- Stoppers not tight
- Not keeping test tubes vertical
Magnesium Carbonate & Acid:
CO2---> dense gas (sinks)
Filled with CO2---> c=gas can't escape
Gas can't escape---> Filled with Hydrogen
POP:
gas is ignited and rushes out of test tube - Rubs against glass causes friction (sound)
Acidification Lab
Sinkholes/Limestone
Limestone:
- soft porous (holds H20)
- Water soluble --> carbonic acid
Sinkholes common in FLA because:
- lots of limestone underground
- was covered by ocean in past
Sulfuric Acid Notes
Discovered in 8th century by Alchemist--> Alchemy "Chemisty"
Uses:
- Lead Acid batteries (cars)
- Fertilizers
- Steel industry --> prevents Rust corrosion
- Dried fruit production (hydrotropic)