Question

A column is packed with 0.5 g of a strongly acidic ion exchange resin in H+ form. A 1.0 M NaCl solution is passed through the column until the eluant coming out becomes neutral. The collected eluant is completely neutralized by 17 ml. of 0.5 M NaOH. The ion exchange capacity of the resin is:

(a) 1.00 meq/g(b) 1.25 meq/g

(c) 1.50 meq/g(d) 1.75 meq/g

Answer 1

The correct answer is 17 meq/g

Step-by-step explanation:

Ion exchange capacity (IEC) express the total of active sites of a resin in which ions are attached because the greater molecular weight.

The exchange Reaction can be represented as

R-H
`R-H^(+) +  Na^(+) + Cl^(-) -> R-Na^(+) + HCl_(aq)`

The IEC value (in meq/g) is determinated by using the next equation:

IEC=[(mL of NaOH)*(M of NaOH)]/mass of resin

IEC [(17 mL)*(0.5 M)/0.5]= 17 meq/g