BIOCHEMISTRY 2-2 Slide 2 PROPERTIES OF WATER Polarity- Water is
polar because of the uneven distribution of electrons between the O
and the H. Slide 3 PROPERTIES OF WATER Hydrogen bond- Water
molecules bond to other water molecules. A substance that is
attracted (can bond) to itself is known as cohesion. Slide 4
PROPERTIES OF WATER Adhesion- attraction of molecules of different
substances. Slide 5 ASSIGNMENT Make a water molecule! Slide 6 THE
*CHEMISTRY OF *WATERCHEMISTRYWATER Key words: Polarity/Dipole,
Cohesive, Adhesion, How does Waters solubility break down a
compound such as salt? *Water is life Slide 7 WATER OLYMPICS Slide
8 Mixture- material composed of two or more elements or compounds
that are physically mixed but not chemically combined. Slide 9
Solution- liquid mixture Solute- the substance that is dissolved.
Solvent the substance into which the solute dissolves. Slide 10
ACIDS, BASES AND PH Acids- A solution that can donate a hydrogen
ion- a proton to another substance. Have a higher H+ concentration.
Generally written in an equation as H(x) Ex. HCl, HF, HBr Acids are
substances that have a pH of less than 7.0 Slide 11 ACID PROPERTIES
Taste- sour when dissolved in water- lemon, lime, grapefruit Touch-
acids produce a burning or stinging sensation. Slide 12 ACID
PROPERTIES Reactivity- react aggressively with most metals.
Electrical Conductivity- can conduct a current depending on the
strength of the acid. Litmus paper- turns paper red Slide 13 BASE
PROPERTIES A solution that can accept a hydrogen ion- a proton-
from another substance. A base is any solution that has a pH
greater than 7.0 Slide 14 BASE PROPERTIES Taste- bitter Tough-
slimy or soapy feeling. Slide 15 BASE PROPERTIES Reactivity- react
violently with acids and can cause burning. Electrical
Conductivity- in solutions such as water will conduct electricity.
Litmus paper- turns paper blue Slide 16 PH SCALE = POTENTIAL OF
HYDROGEN Identifies a substance as acidic or basic 0-6.9 = acidic
0-4 strong acid 4.01-6.9 weak acid 7.01-14= basic 7.01-10= weak
base 10.01-14= strong base Slide 17 BUFFER Weak acids or bases that
balance strong acids/bases in the body to help keep the body in
homeostasis. Slide 18 ASSIGNMENT
