What is cation exchange resin give example?
Cation exchange resins are used in medicine to remove an excess of a particular positively charged ion that has accumulated in the body. When the resin is administered to the patient the positively charged ions binds to the resin in an exchange for another positive ion.
What is cation exchange resin?
Cation-Exchange Resins. A cation-exchange resin is a cross-linked polymer with negatively charged structural units. The resin can exchange bound Na+ (Kayexalate) or Ca2+ (calcium resonium) for cations including K+. The purpose of using resins is to enhance the elimination of K+ from the gastrointestinal tract.
How do you calculate resin ion-exchange capacity?
We now have to multiply this by 7.48 gal/cu ft to equate the number to a cubic foot of resin: 2,923.98 x 7.48 = 21,871. So 1 meq/mL is equal to 21.87 Kgr/cu ft. A new resin with 2.0 meq/mL has a total capacity of 43.74 Kgr/cu ft.
How do you write an ion-exchange reaction?
In terms of a chemical equation, the process is 2K+ + Ca2+(soil) ⇌ Ca2+ + 2K+(soil), in which the double arrow indicates that the exchange is reversible.
Which is the cation exchanger?
Polymers containing acid groups are classified as acid, or cation, exchangers because they exchange positively charged ions, such as hydrogen ions and metal ions; those containing ammonium groups are considered basic, or anion, exchangers because they exchange negatively charged ions, usually hydroxide ions or halide …
How do you make ion exchange resin?
Ion-exchange resins as membranes and in granular form have been prepared by the copolymerization of divinylbenzene with various esters of p-styrene-sulphonic acid and subsequent hydrolysis. The synthesis of the sulphonated styrene monomers is described.
What is capacity of ion exchange resin?
In general terms, the capacity of an ion exchange resin can be expressed as the quantity of ions that can be taken up by a specific volume of the resin. A measured quantity of caustic (NaOH) is then passed through the resin so as to totally exhaust the resin.
What is the chemical equation for an exchange reaction?
The simplest form of an exchange reaction might be: A+BC→AB+C. Notice that, to produce these products, B and C had to break apart in a decomposition reaction, whereas A and B had to bond in a synthesis reaction. A more complex exchange reaction might be: AB+CD→AC+BD. Another example might be: AB+CD→AD+BC.
What is the purpose of cation exchange resins?
The resin can exchange bound Na+ (Kayexalate) or Ca 2+ (calcium resonium) for cations including K +. The purpose of using resins is to enhance the elimination of K + from the gastrointestinal tract. The cation-exchange resin Kayexalate contains 4 mEq of Na+ /g.
How do you remove the hardness of water by cation exchange?
The cation exchange method removes the hardness of water but induces acidity in it, which is further removed in the next stage of treatment of water by passing this acidic water through an anion exchange process. R−H + M + = R−M + H +.
What is the difference between anion resin and cation resin?
Anion resins and cation resins are the two most common resins used in the ion-exchange process. While anion resins attract negatively charged ions, cation resins attract positively charged ions.
What is the formula for anion-exchange chromatography?
R−H + M + = R−M + H +. Often these are styrene – divinylbenzene copolymer resins that have quaternary ammonium cations as an integral part of the resin matrix. Anion-exchange chromatography makes use of this principle to extract and purify materials from mixtures or solutions .
