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Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
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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.
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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.
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Related Experiment Video

Updated: Feb 18, 2026

Calcium Carbonate Formation in the Presence of Biopolymeric Additives
09:31

Calcium Carbonate Formation in the Presence of Biopolymeric Additives

Published on: May 14, 2019

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Correction: Calcium carbonate crystallisation at charged graphite surfaces.

E R Ravenhill1, M Adobes-Vidal, P R Unwin

  • 1Department of Chemistry, University of Warwick, Gibbet Hill, Coventry, CV4 7AL, UK. P.R.Unwin@warwick.ac.uk.

Chemical Communications (Cambridge, England)
|November 23, 2017
PubMed
Summary
This summary is machine-generated.

This correction clarifies findings on calcium carbonate crystallization at charged graphite surfaces. The original study

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Crystallography

Background:

  • Understanding mineral formation on charged surfaces is crucial for various applications.
  • Graphite's unique electronic properties make it an interesting substrate for surface studies.

Purpose of the Study:

  • To correct and clarify the findings presented in the original publication.
  • To ensure accurate reporting of calcium carbonate crystallization behavior on charged graphite.

Main Methods:

  • Spectroscopic analysis
  • Microscopy techniques
  • Electrochemical methods

Main Results:

  • The correction addresses specific details regarding crystal morphology and growth kinetics.
  • Revised data provides a more accurate representation of calcium carbonate precipitation.

Conclusions:

  • Accurate understanding of calcium carbonate crystallization on graphite is essential.
  • The corrected findings contribute to the precise knowledge of interfacial processes.