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Related Concept Videos

Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Colloidal precipitates01:09

Colloidal precipitates

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...
Precipitation Reactions03:10

Precipitation Reactions

In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
Precipitation Titration Curve: Analysis01:21

Precipitation Titration Curve: Analysis

The precipitation titration curve demonstrates the change in concentration of one reactant with the volume of titrant added. During the titration of chloride ions with silver nitrate, the precipitation titration curve is divided into three regions: before, at, and after the equivalence point. Before the equivalence point, low redissolution of the sparingly soluble silver chloride precipitate gives a low silver ion concentration. However, in the second region, representing the equivalence point,...
Precipitation of Ions03:11

Precipitation of Ions

Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Chemical Reactions in Aqueous Solutions03:03

Chemical Reactions in Aqueous Solutions

Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.

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Related Experiment Video

Updated: Jul 12, 2026

Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
10:19

Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers

Published on: September 27, 2018

Ice nucleation by solid solutions of silver-copper iodide.

R E Passarelli, H Chessin, B Vonnegut

    Science (New York, N.Y.)
    |August 10, 1973
    PubMed
    Summary

    Researchers reduced ice-silver iodide lattice misfit by substituting copper for silver. The optimal CuI-3AgI composition created the most active silver-copper iodide nucleation catalyst for ice formation.

    Area of Science:

    • Materials Science
    • Crystallography
    • Atmospheric Science

    Background:

    • Lattice misfit between ice and silver iodide hinders efficient ice nucleation.
    • Silver iodide is a common ice nucleating agent but has limitations.

    Purpose of the Study:

    • To reduce the lattice misfit between ice and silver iodide.
    • To develop a more active silver-copper iodide nucleation catalyst.

    Main Methods:

    • Partial substitution of copper atoms for silver atoms in the silver iodide lattice.
    • Investigated various compositions of silver-copper iodide.

    Main Results:

    • Reduced lattice misfit achieved through copper substitution.
    • Optimal crystal match obtained with CuI-3AgI composition.

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    Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
    10:19

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    Published on: September 27, 2018

    The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
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    The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique

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  • This composition demonstrated the highest activity as a silver-copper iodide nucleation catalyst.

    • Conclusions:

    • Partial substitution of copper in silver iodide effectively reduces lattice misfit with ice.
    • The CuI-3AgI composition represents a highly active ice nucleation catalyst.