colloids

Question 1

how do we establish turbidity

Answer 1

light scattering done by particles in a colloid.

Question 2

what is fardayl-tyndall effect

Answer 2

it is a law;
the longer the wavelength are the more transmitted
the shorter wavelength are more diffusely reflected via scattering

Question 3

what is the formula of turbidity q

Answer 3

I=Ioe^-piI

Question 4

what does light scattering allow

Answer 4

molecular weight measurement of colloid, shape and size of colloids

Question 5

what is the formula for finding mw

Answer 5

HC/T= 1/Mw +2BC

Question 6

how do we visualise

Answer 6

dark-filled microscope; blacked background right angle to beam of incident light. bright spots

Question 7

ficks first law

Answer 7

dm is the amount of x diffusing in the time,dt, across an area, A, under the influence of a conc gradient dc/dx. with respect of to constant

Question 8

how do we find radius of using diffusion coefficient

Answer 8

d=RT/6pinrN

Question 9

how do we find Mw of spherical molecules

Answer 9

d=RT/6pinrN {4piN/3Mv}

Question 10

osmotic pressure

Answer 10

pressure applied to solution A to prevent solvent moving to solution A to balance out conc

Question 11

van hoffs equation

Answer 11

defines Pi as a function of number of solvents in volume of V