2. 5 g of a strong basic anion in the OH form was added to 200 ml of HCl with a concentration of 0.11 mol/l. After establishing the ion exchange equilibrium, 25 ml of the solution was taken, which required 10.5 ml of NaOH with a concentration of 0.05 mol/l to neutralize it. Calculate the TEC (total exchange capacity) of the cation exchanger.

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