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)