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Weak Base Solutions03:21

Weak Base Solutions

25.3K
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
25.3K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
30.9K
Weak Acid Solutions04:02

Weak Acid Solutions

43.3K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
43.3K
Titration of a Weak Acid with a Weak Base01:08

Titration of a Weak Acid with a Weak Base

5.0K
Weak acids and bases do not undergo dissociation completely, and titrations between these two are rarely studied. When such studies are performed, say, for the titration of a weak acid with a weak base, the titration curve plots the change in pH as a function of the volume of base added. Take the titration of acetic acid with ammonia, for instance. During the titration, these two species form ammonium acetate and water, but the pH change is slow and gradual.
As a result, there is no simple...
5.0K
Ionic Crystal Structures02:42

Ionic Crystal Structures

17.2K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
17.2K
Titration Calculations: Weak Acid - Strong Base03:55

Titration Calculations: Weak Acid - Strong Base

49.3K
Calculating pH for Titration Solutions: Weak Acid/Strong Base
For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be represented as:
49.3K

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Weak inter-actions in crystals: old concepts, new developments.

Andrei S Batsanov1

  • 1Department of Chemistry, Durham University, Science Site, South Road, Durham DH1 3LE, UK.

Acta Crystallographica. Section E, Crystallographic Communications
|June 1, 2018
PubMed
Summary
This summary is machine-generated.

This review explores weak interactions in crystals, covering their historical development, current understanding, and future research directions in crystallography.

Keywords:
crystallographyeditorialweak interactions

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Area of Science:

  • Crystallography and Materials Science

Background:

  • Weak interactions are fundamental forces influencing crystal structures and properties.
  • Understanding these interactions is crucial for predicting and controlling material behavior.

Purpose of the Study:

  • To provide a comprehensive overview of weak interactions in crystals.
  • To trace the historical evolution of this research field.
  • To outline the current state-of-the-art and future prospects.

Main Methods:

  • This work is a review, synthesizing existing literature and research findings.
  • It draws upon historical data, experimental results, and theoretical models.

Main Results:

  • Weak interactions play a significant role in crystal packing and stability.
  • The field has evolved from basic observations to sophisticated theoretical models.
  • Current research focuses on quantifying and predicting these interactions.

Conclusions:

  • Weak interactions are a critical area of study in modern crystallography.
  • Continued research will advance the design and application of crystalline materials.