Science Study Guide

Study for Science!

4.9 - Acidification Test

Gases that dissolve in our atmosphere:

- Carbon Dioxide

- Sulfur

- Hydrogen Chloride

Acidification of Water

- Phenol red changes color as you add carbon dioxide into water

- the carbon dioxide turns into carbonic acid lowers ph and dissolves calcium faster


- The oceans ph has decreased 0.1

- about 25% drop in ph

- This lower ph will cause shelled animals (shrimp, mollusks, etc.) to not be able to build a shell

Sulfuric Acid

Sulfuric Acid

- Discovered in the 8th century by Alchemist - Alchemy "Chemistry"

- Uses:

- it is used in lead acid batteries

- fertilizers

- steel industry

- and.. dried fruit

LABS! 2 Gases and Acidification of Water!

2 Gases:

- Collect and compare the gases produced by the reaction of sulfuric acid with both pure magnesium and magnesium carbonate

- Magnesium and Acid

- Upright: whistles

- Inverted: popped

- Magnesium Carbonate and Acid

- Upright: Stayed lit

- Inverted: Went out


- Upright: went out at a slow speed

- Inverted: Burned out fast

Acidification of Water

- determine if we can change the acidity of water by dissolving carbon dioxide from out lungs

- Phenol Red in Water

- Hot pink

- With Carbon Dioxide over Water

- Orange

- With Carbon Dioxide in water

- Yelllow



Sink Holes and Limestone


- porous (holds water)

- soft

- soluble in water (carbonic acid)

FLORIDA sinkholes are very common because...

- There is a lot of limestone

- There are underground caves submerged in water (aquifer)

Why are there soft calcium deposits (dead animals)?

- the ocean once covered us!