/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 31 (a) What is meant by the term ch... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 23: Problem 31

(a) What is meant by the term chelate effect? (b) What thermodynamic factor is generally responsible for the chelate effect? (c) Why are polydentate ligands often called sequestering agents?

Short Answer

Expert verified
(a) The chelate effect refers to the enhanced stability of a complex formed by a polydentate ligand binding to a metal ion, compared to a monodentate ligand, due to the formation of chelate rings. (b) Entropy is the thermodynamic factor responsible for the chelate effect, as the increase in overall entropy due to the release of multiple counter ions makes chelate complex formation more favorable. (c) Polydentate ligands are called sequestering agents because they can capture and form stable complexes with metal ions, rendering them inactive for chemical reactions, which can be used for applications such as removing heavy metal ions from a system.

Step by step solution

01

(a) Explaining the term chelate effect

A chelate effect refers to the enhanced stability of a complex, which is formed when a polydentate ligand (a ligand that can bind to a metal ion through more than one place) binds to a metal ion as compared to the stability of a complex formed with a monodentate ligand (a ligand that can bind through only one place). This increased stability is due to the formation of a ring-like structure, called a chelate ring, which involves both the central metal ion and the polydentate ligand.
02

(b) Thermodynamic factor responsible for the chelate effect

The thermodynamic factor responsible for the chelate effect is entropy. When a polydentate ligand replaces monodentate ligands in a complex, there is an increase in the overall entropy of the system due to the release of multiple counter ions. This leads to a more positive (favorable) change in entropy, thus making the formation of the chelate complex thermodynamically more favorable compared to the formation of a complex with monodentate ligands.
03

(c) Polydentate ligands as sequestering agents

Polydentate ligands are often called sequestering agents because they can "sequester," or capture and form stable complexes with metal ions, rendering them inactive or unavailable for chemical reactions. This property makes polydentate ligands useful for various applications, such as the removal of heavy metal ions from a system, as these complexes are thermodynamically stable due to the chelate effect and do not participate in further chemical reactions.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

(a) If a complex absorbs light at \(610 \mathrm{~nm}\), what color would you expect the complex to be? (b) What is the energy in Joules of a photon with a wavelength of \(610 \mathrm{~nm}\) ? (c) What is the energy of this absorption in \(\mathrm{kJ} / \mathrm{mol}\) ?

The coordination complex \(\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]\) forms colorless, diamagnetic crystals that melt at \(90{ }^{\circ} \mathrm{C}\). (a) What is the oxidation number of chromium in this compound? (b) Given that \(\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]\) is diamagnetic, what is the electron configuration of chromium in this compound? (c) Given that \(\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]\) is colorless, would you expect CO to be a weak-field or strongfield ligand? (d) Write the name for \(\left[\mathrm{Cr}(\mathrm{CO})_{4}\right]\) using the nomenclature rules for coordination compounds.

True or false? The following ligand can act as a bidentate ligand? c1ccc2nc3ccccc3nc2c1

A classmate says, "A strong-field ligand means that the ligand binds strongly to the metal ion." Is your classmate correct? Explain.

Generally speaking, for a given metal and ligand, the stability of a coordination compound is greater for the metal in the \(+3\) rather than in the \(+2\) oxidation state (for metals that form stable \(+3\) ions in the first place). Suggest an explanation, keeping in mind the Lewis acid-base nature of the metalligand bond.
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Analysis

Read Explanation

Chemical Reactions

Read Explanation

The Earths Atmosphere

Read Explanation

Inorganic Chemistry

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Kinetics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.