PreLab Exp4 Flashcards
Animal membranes, cellophanes and collodion has how many angstrom?
7 angstrom diameter
How many angstrom can pass through easily through the pores?
Less than 7
Retains in semi permeable materials
Colloids
Larger molecules
Colloids
Smaller colloids
Crystalloid
NaCl
Crystalloid
Polysaccharide
Colloids
Aggregates of molecules with a diameter of 1um to 100 um
Colloids
Unaffected by gravity
Colloids
Remain suspended in the solvent indefinitely
Colloidal Dispersion/Solution
Suspension of TINY PARTICLES of one substance
Dispersed Phase
A MEDIUM where the particles are SUSPENDED
Dispersion Medium
Has affinity for solvents
Emulsoids
Emulsoids forms what substance when in contract with water
Emulsoids
Lyophilic colloid system
Emulsoids
NO AFFINITY for water
Suspensoids
Lyophobic/hydrophobig colloid system
Suspensoids
Starch+water
Colloidal Dispersion
Small molecules that can pass through all cell membranes
Crystalloids
Examples of crystalloids
Glucose
Salt
Electrolytes
Magnesium
In the cellophane solution, what reagent is used in TT A?
AgNo3
In the cellophane solution, what reagent is used in TT B?
Lugol’s iodine
In the dialysate solution, what reagent is used in TT A?
AgNo3
In the dialysate solution, what reagent is used in TT A?
Lugol’s iodine
In the cellophane solution, what is the expected result in TT A if it is a CRYSTALLOID?
Forms a white ppt
In the cellophane solution, what is the expected result in TT B if it is a COLLOID?
If STARCH is PRESENT, there will be a color development of DARK-BLUE BLACK
In the dialysate solution, what is the expected result in TT A if it is a CRYSTALLOID?
White ppt is formed
In the dialysate solution, what is the expected result in TT B if it is a COLLOID?
No development of colloid, wherein starch remained in the cellophane
