Ion-Exchange Quiz

Questions and Answers

What is ion-exchange based on?

Reversible exchange of ions between a solid and a liquid (correct)

Irreversible exchange of ions between a solid and a liquid

Formation of new ions in a liquid-solid interaction

Complete change in the structure of the solid

What does ion chromatography rely on?

Formation of new ions during the chromatography process

Equilibration of solute ions between the solvent and charged sites fixed on the stationary phase (correct)

Complete change in the structure of the solvent

Irreversible binding of solute ions to the stationary phase

What do anion exchangers contain?

Non-covalently bound positively charged sites that bind solute cations

Covalently bound positively charged sites that bind solute anions

Covalently bound negatively charged sites that bind solute anions (correct)

Non-covalently bound negatively charged sites that bind solute cations

What is exhaustion in the context of cation exchangers?

When the ions are exchanged from the liquid to the resin Signup and view all the answers

How are polystyrene resins for ion exchange made?

By the copolymerization of styrene and divinylbenzene Signup and view all the answers

What are polystyrene resins for ion exchange made of?

Styrene and divinylbenzene Signup and view all the answers

What type of ion exchangers are commonly classified as strongly or weakly acidic or basic?

Strongly acidic or basic Signup and view all the answers

What chemical groups can be present in weak base ion exchangers?

Chelating groups Signup and view all the answers

What type of exchange resin contains sulfonate groups?

Strong Acid Cation (SAC) Exchange Resin Signup and view all the answers

What remains ionized even in strongly acidic solutions?

Sulfonate groups Signup and view all the answers

Study Notes

Ion Exchange

Ion-exchange is based on the reversible interchange of ions between a solution and an ion-exchange material.

Ion Chromatography

Ion chromatography relies on the ability of an ion-exchange material to separate ions based on their affinity for the material.

Anion Exchangers

Anion exchangers contain quaternary ammonium groups.

Cation Exchangers

Exhaustion in the context of cation exchangers refers to the point at which the exchanger is fully saturated with ions and can no longer exchange them.
Polystyrene resins for ion exchange are made by sulfonating polystyrene beads.
Polystyrene resins for ion exchange are made of polystyrene cross-linked with divinylbenzene.

Classification of Ion Exchangers

Ion exchangers can be commonly classified as strongly or weakly acidic or basic.

Weak Base Ion Exchangers

Weak base ion exchangers can contain tertiary amine or quaternary ammonium chemical groups.

Strong Acid Cation Exchangers

Strong acid cation exchangers contain sulfonate groups, which remain ionized even in strongly acidic solutions.

Description

Test your knowledge of ion-exchange with this quiz! Explore the principles of ion chromatography, reversible ion exchange between solid and liquid phases, and the role of charged sites in the stationary phase. Perfect for chemistry enthusiasts and students.