biol 227 Exam Study Guide with Complete Answers
organic compound
substances containing both H and C
inorganic compound
substances that do NOT contain H and C
cohesion
attraction between water molecules
surface tension
inward pulling on surface of the water
adhesion
attraction between water molecules and a substance other than water
reason for water properties
hydrogen bonds
suspension
heterogenous, large particles, suspended in fluid, does not remain mixed unless in motion
colloid
smaller particles, cloudy/opaque, remains mixed when not in motion
ex: milk, cytosol, blood plasma
emulsion
specific type of colloid
water + non polar (hydrophobic) substance
, doesn't "mix" unless agitated
ex: breast milk
solution
homogenous mixture with dissolved particles
solvent + solute
ex: salt water, sugar water
solvent
liquid that dissolves solute
dissociation
solute molecules come apart
dissociate vs dissolve
dissolve: mixing solute into solvent; creates homogenous mixture
dissociate: breaking down molecule or compound into smaller parts
hydrophobic
Water fearing, non polar molecules
acid
H+ donor
increase [H+] (concentration)
strong acid: dissociate to greater extent
weak acid: dissociate to lesser extent
base
H+ acceptor
decreases [H+]
organic compound
substances containing both H and C
inorganic compound
substances that do NOT contain H and C
cohesion
attraction between water molecules
surface tension
inward pulling on surface of the water
adhesion
attraction between water molecules and a substance other than water
reason for water properties
hydrogen bonds
suspension
heterogenous, large particles, suspended in fluid, does not remain mixed unless in motion
colloid
smaller particles, cloudy/opaque, remains mixed when not in motion
ex: milk, cytosol, blood plasma
emulsion
specific type of colloid
water + non polar (hydrophobic) substance
, doesn't "mix" unless agitated
ex: breast milk
solution
homogenous mixture with dissolved particles
solvent + solute
ex: salt water, sugar water
solvent
liquid that dissolves solute
dissociation
solute molecules come apart
dissociate vs dissolve
dissolve: mixing solute into solvent; creates homogenous mixture
dissociate: breaking down molecule or compound into smaller parts
hydrophobic
Water fearing, non polar molecules
acid
H+ donor
increase [H+] (concentration)
strong acid: dissociate to greater extent
weak acid: dissociate to lesser extent
base
H+ acceptor
decreases [H+]
