Introduction to Colloid and Surface Chemistry |
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Page 20
... concentration gradient dc / dx at the plane in question dc dø = − DA dt dx ( The minus sign denotes that diffusion takes place in the direction of decreasing concentration . ) The rate of change of concentration at any given point is ...
... concentration gradient dc / dx at the plane in question dc dø = − DA dt dx ( The minus sign denotes that diffusion takes place in the direction of decreasing concentration . ) The rate of change of concentration at any given point is ...
Page 30
... concentration ) are separated from one another by a semipermeable membrane , i.e. a membrane which is permeable to the solvent but not to the solute . The tendency to equalize chemical potentials ( and hence concentrations ) on either ...
... concentration ) are separated from one another by a semipermeable membrane , i.e. a membrane which is permeable to the solvent but not to the solute . The tendency to equalize chemical potentials ( and hence concentrations ) on either ...
Page 147
... Concentrations The transition between stability and flocculation , although in principle a gradual one , usually occurs over a small range of electrolyte concentration , and flocculation concentrations can be determined quite sharply ...
... Concentrations The transition between stability and flocculation , although in principle a gradual one , usually occurs over a small range of electrolyte concentration , and flocculation concentrations can be determined quite sharply ...
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acid adsorbed adsorption adsorption isotherm approximately aqueous behaviour Brownian calculated cell charged surface chemisorption cm-¹ cm³ coefficient colloidal dispersions colloidal particles colloidal systems constant contact angle counter-ions curve cylinder decreases deflocculated deformation depends detergent diffusion dispersion medium distance droplets effect electrical double layer electrode electrolyte emulsifying equation equilibrium example Figure film flocculation flocculation concentration flow hydrocarbon chains hydrophilic increase interaction interface intrinsic viscosity ionic ions isotherms light scattered material measured membrane method micelles mixed film molecular weight molecules monolayer monomolecular motion O/W emulsions orientated osmotic pressure physical adsorption plate polymer polymerization pores porous potential energy potential gradient protein ratio relative repulsive sample sedimentation shear soaps sodium solid surface soluble solution solvation solvent spherical particles stability Stern layer stress surface tension surface-active surfactant temperature theory thermal thixotropic valency vapour pressure velocity viscoelastic viscometer volume W/O emulsions Waals wetting zero zeta potential