1. part 2: chemical reactions, acids and bases
The Chemistry of Life
part 2: chemical reactions, acids and bases

2. Chemical Reactions Occur when bonds are formed or broken
Occur in the cells of living things – break down and build important molecules

3. Metabolism
All of the chemical reactions that occur within an organism

4. Dehydration Synthesis
Removing water to join two molecules together
Adding water to split apart a large molecule into smaller molecules
Hydrolysis

5. Chemical Equations Law of Conservation of Matter
Must be balanced – same number of atoms of each element on both sides of the arrow.

6. reactants
products
2 H2 + O H2O
number of molecules
number of atoms

7. Remember this equation!
C6H12O6 + O CO2 + H2O
+Energy 6 6 6
Remember this equation!

8. Acids and Bases pH is a measure of how acidic or basic a solution is.
An acid is a substance that forms hydrogen ions (H+) in water.
A base is a substance that forms hydroxide ions (OH-) in water.

11. pH of human blood is just over 7.5.
Buffers help the human body maintain equilibrium of the blood’s pH level
Example of homeostasis