Decreasing the cross-linking density of the ion-exchange medium within the colum

Question

Decreasing the cross-linking density of the ion-exchange medium within the column will result in:

A)increased equilibration time with increased selectivity and decreased exchange capacity.

B)decreased exchange capacity with increased selectivity, increased swelling, unchanged equilibration time.

C)decreased exchange capacity and selectivity, increased swelling, shorter equilibration time.

D)increased exchange capacity and selectivity, increased swelling, shorter equilibration time.

- Choose the correct order of selectivity for cations in a cation-exchange resin

a)Al3 > Pb2 = Ca2 = Mg2 > Ag = Na = H b)Al3 > Pb2 > Ca2 > Mg2 > Ag > Na > H c)H > Na > Ag > Mg2 > Ca2 > Pb2 > Al3 increased equilibration time with increased selectivity and decreased exchange capacity.

Explanation / Answer

Answer C

As a result of cross-linking increase in swelling occurs in the liquid. Due to high electrostatic interaction, selectivity and exchange capacity decreases as result of cross-linking. However, this increased electrostatic attraction decreases the equilibration time.

As per policy of Chegg, only one question is answered.

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