1. Ocean Acidification
Topics
Acids
Bases
pH Scale
Ocean Acidification

2. What is an acid?
An acid is a solution that has an excess of H+ ions. It comes from the Latin word acidus that means "sharp" or "sour".
The more H + ions, the more acidic the solution.

3. The opposite of an acid is a base What is a base?
A base is a solution that has an excess of OH- ions.
Another word for base is alkali.
Bases are substances that can accept hydrogen ions

4. pH Scale pH is a measure of how acidic or basic a solution is.
The pH scale ranges from 0 to 14.
A solution with a pH of 7 is neutral.
Pure water has a pH of 7.
Acidic solutions have pH values below 7
Basic solutions have pH values above 7.

5. Ocean Acidification
Changes in seawater chemistry are occurring throughout the world's oceans.
Since the beginning of the industrial revolution, the release of carbon dioxide (CO2) from human industrial activity and agricultural activities has increased the amount of CO2 in the atmosphere.

6. Ocean Acidity
The ocean absorbs about a quarter of that CO2 we release into the atmosphere every year
Therefore as atmospheric CO2 levels increase, so do the levels in the ocean.

7. Ocean Acidification
CO2 absorbed by the ocean is changing the chemistry of the seawater, a process called OCEAN ACIDIFICATION. (CO2 + H20+ CO3= 2HCO3)