concentration on zeta potential.

b$)$ The following data are available from a measurement of the zeta potential in an aqueous suspension of kaolin particles at $25C$ :

diameter of the spherical particles: $0\mathrm{.}75$ micrometre $(m)$;

concentration of NaCl in water: $0\mathrm{.}003M$;

movement of the particle: $350m$;

time for movement of particle: $4\mathrm{.}2$ s:

potential of the field in a $10cm$ cell: $200V.$

Moreover, the following values are available for the $f$ correction parameter of the Henry equation for various values of $R($ is the Debye length and $R$ is the radius of the particle$)$:

$\backslash$table$[[R,fR,R,fR$