u nit 2 s ec 2.2 properties of water. a. p olarity 1.water = h 2 o 2.oxygen and hydrogen bonded by:...
TRANSCRIPT
UNIT 2SEC 2.2Properties of Water
A. POLARITY1. Water = H2O
2. Oxygen and hydrogen bonded by: 3. Polar Molecule: electrons are not shared equally 4. Water = universal solvent ionic compounds
1. When ionic compounds are dissolved in water, _________________________.
POLARITY OF WATER
B. HYDROGEN BONDING
1. Hydrogen Bond- bond between a hydrogen & oxygen of 2 water molecules
a) bond btwn water molecules
b) Weakest of the three chemical bond
C. COHESION AND ADHESION1. Cohesion: attractive force btwn particles of
same kind2. Adhesion: attractive force btwn 2 unlike
substance3. Capillarity: movement of water upward against
force of gravitya) Capillarity =
WATER HAS POLAR BONDING
YOUR BODY IS 75 PERCENT WATER!
Animals lose water by Animals gain water byUrinating -DrinkingSweating -Eating FoodBreathing
ESSENTIAL USES OF WATER IN ANIMALS
CoolingChemical reactions
Transport food & waste
Makes up most of body fluids
PLANTS DEPEND ON WATER.Plants use water
forPhotosynthesisChemical reactionsTransportation
Plants absorb waterthrough their roots
E. DESCRIBING SOLUTIONS
A. Solutions: mixture where substances are distributed evenly
1. Solute2. Solvent3. Aqueous solution:
F. ACIDS AND BASES
A. Dissociation of water1. Dissociation: breaking water into a positive &
negative charge particle2. Acids:
1. Solution containing more hydronium ions (H+)
F. ACIDS AND BASES
3. Bases:1. Solution containing more hydroxide ions (OH-)
4. pH scale: measures how base or acidic
An acid produces H+
A base absorbs H+