Question

A student has carried out a moving boundary experiment using K2SO4 as an electrolyte. The data obtained was tabulated below:

Cation velocity: 11.43 mms-1

Cross-sectional area of tube: 28.56 mm2

Transference number of cation: 0.593

Anion concentration: 0.025 mol dm-3

Calculate the current flow for the boundary moves as far as 45 mm.

Answer 1

$nk=\frac{ShCk}{mK}$

$mK=\frac{ShCk}{nk}=\frac{28.56*45*2.5*10^{-8}}{0.593}=0,00054$