Final equilibria steps:

Problem

In the extraction of MnO₄^- by tetraphenylarsonium  chloride, cite the final equilibria steps which show the increase or decrease in extraction by change in the experimental variables.

Answer:

The equations which express the dependence of extraction of MnO₄^- by (C₆H₅)₄ As⁺. Cl^- on experimental parameter are

i) D = [(R₄As⁺.MnO₄^- )]_o/[ MnO₄^-]_a

= K_DX K_f. [R₄ As⁺]a

The extraction will increase with the increase in the extractant, R₄As⁺ concentration

ii) D = K _DX K _f K /K_{DR .} [(R₄As⁺.Cl^-)]_o/[Cl^-]_a

 The extraction will decrease with the increase in chloride ion concentration.