Colloidal Dispersion

Question 1

System in which particles of colloidal size of any nature are dispersed in a continuous phase of a different composition

Answer 1

Colloidal system

Question 2

One or more substances that have at least one dimension in range of: 10-100A, 1-10 nm at the lower end, and a few micrometers at the upper end

Answer 2

Colloidal state

Question 3

Substances that do not diffuse through a semi-permeable membrane

Answer 3

Colloid

Question 4

Those substances that do diffuse through a semi-permeable membrane and which are therefore in true solution

Answer 4

Crystalloid

Question 5

“Solvent-loving colloids”; readily solvated and dispersed

Answer 5

Lyophilic colloids

Question 6

“Solvent-hating colloids”; little or no affinity for the dispersing medium and are not solvated

Answer 6

Lyophobic colloids

Question 7

Colloids characterized by having two distinct regions of opposing solution affinities within the same molecule or ion

Answer 7

Association colloids

Question 8

The attraction of the dispersed phase and the dispersion medium

Answer 8

Solvation

Question 9

Acquire a charge by ionization and can be precipitated by small concentration of electrolytes or oppositely charged colloids

Answer 9

Hydrophilic colloids

Question 10

When substances are easily dispersed to form a colloid

Answer 10

Peptization

Question 11

Aggregates that contain 50 or more monomers; diameter range: between 50-80 A

Answer 11

Micelles

Question 12

Concentration of monomer at which the micelles are formed

Answer 12

Critical micelle concentration (CMC)

Question 13

The number of monomers that aggregate to form a micelle

Answer 13

Aggregation number

Question 14

Property used for determining the molecular weight of colloids

Answer 14

Optical properties/Faraday-Tyndall effect

Question 15

Property which involves motion of particles with respect to dispersion

Answer 15

Kinetic properties

Question 16

Property which involves movement of charged surface with respect to an adjacent liquid phase

Answer 16

Electrical properties/Electrokinetic phenomena

Question 17

The movement of charged particles through the liquid under the influence of an applied potential difference

Answer 17

Electrophoresis

Question 18

The liquid moves through a plug or membrane across which a potential is applied

Answer 18

Electroosmosis

Question 19

Creation of a potential when particles undergo sedimentation

Answer 19

Sedimentation potential

Question 20

Differs from electroosmosis in that the potential is created by forcing the liquid to flow through a plug or bed of particles

Answer 20

Streaming potential