Relationships for Pure Cation or Anion Exchange on Weak Electrolyte Resins

In the case of weakly acidic exchange resins there is no exchange of anions. Therefore, the terms for anions in the general equation [24] vanish. For a simple system with H+ andNa+ ions, eqn [21] simplifies to:

In a similar way, there is no exchange of cations by weakly basic exchangers. For the uptake of hydrochloric acid eqn [20] yields:

The uptake of anions by protonated functional groups is equivalent to the exchange of anions for hydroxyl groups:

The subscripts I and II refer to the assumption of either monovalent or divalent functional sites. If a system contains monovalent and divalent counter-ions the entire calculation has to assume divalent functional sites. Equilibrium parameters derived from

A similar theoretical development of the exchange of OH" for Cl" ions leads to the equilibrium relationship:

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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