Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Precipitation Processes01:12

Precipitation Processes

5.0K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
5.0K
Precipitation Reactions03:10

Precipitation Reactions

51.2K
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...
51.2K
Types of Coprecipitation01:10

Types of Coprecipitation

5.5K
Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
5.5K
Washing, Drying, and Ignition of Precipitates00:52

Washing, Drying, and Ignition of Precipitates

5.8K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
5.8K
Catalysis02:50

Catalysis

22.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
22.9K
Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview01:27

Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview

1.3K
Wilhelm Rudolph Fittig discovered the pinacol coupling reaction in 1859. It is a radical dimerization reaction and involves the reductive coupling of aldehydes or ketones in the presence of hydrocarbon solvent to yield vicinal diols.
1.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Collective dynamics and self-assembly of calcium-alginate motors of varying sizes.

Scientific reports·2026
Same author

Designing soft materials through synthetic morphogenesis.

Nature communications·2026
Same author

Synchronization modes of chitosan surfers with various sizes.

Soft matter·2025
Same author

Membrane-dependent dynamics and dual translocation mechanisms of ABCB4: Insights from molecular dynamics simulations.

Computational and structural biotechnology journal·2025
Same author

Next generation of porphysomes for improved photodynamic therapy applications.

Journal of controlled release : official journal of the Controlled Release Society·2025
Same author

Diffusion-driven growth of calcium carbonate polymorphs in microchannels.

RSC advances·2024

Related Experiment Video

Updated: May 1, 2026

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions
11:44

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions

Published on: March 20, 2014

25.9K

Diffusive fingering in a precipitation reaction driven by autocatalysis.

Eszter Tóth-Szeles1, Ágota Tóth, Dezső Horváth

  • 1Department of Physical Chemistry and Materials Science, University of Szeged, Szeged 6720, Hungary.

Chemical Communications (Cambridge, England)
|April 12, 2014
PubMed
Summary

Differential diffusion drives pattern formation in coupled autocatalytic and precipitation reactions. This study reveals how cellular fronts evolve into precipitate-free zones, creating permanent patterns observed experimentally.

More Related Videos

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

14.1K
A Femtoliter Droplet Array for Massively Parallel Protein Synthesis from Single DNA Molecules
10:45

A Femtoliter Droplet Array for Massively Parallel Protein Synthesis from Single DNA Molecules

Published on: June 20, 2020

10.0K

Related Experiment Videos

Last Updated: May 1, 2026

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions
11:44

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions

Published on: March 20, 2014

25.9K
Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

14.1K
A Femtoliter Droplet Array for Massively Parallel Protein Synthesis from Single DNA Molecules
10:45

A Femtoliter Droplet Array for Massively Parallel Protein Synthesis from Single DNA Molecules

Published on: June 20, 2020

10.0K

Area of Science:

  • Chemical kinetics
  • Pattern formation
  • Materials science

Background:

  • Autocatalytic reactions and precipitation reactions are fundamental chemical processes.
  • Understanding the interplay between reaction dynamics and spatial pattern formation is crucial in chemistry and materials science.

Purpose of the Study:

  • To investigate the spatio-temporal dynamics arising from the interaction of autocatalytic and precipitation reactions.
  • To elucidate the mechanism behind the formation of permanent precipitate patterns driven by differential diffusion.
  • To model and reproduce experimental observations using a simplified theoretical approach.

Main Methods:

  • Experimental study of coupled autocatalytic and precipitation reactions.
  • Analysis of pattern formation at the cellular front.
  • Development of a simple model calculation based on an empirical rate law.

Main Results:

  • A permanent precipitate pattern is generated through the interaction of autocatalytic and precipitation reactions.
  • Differential diffusion is identified as the primary driving force for pattern formation.
  • The cusps of the transient cellular front evolve into precipitate-free zones, defining the final structure.

Conclusions:

  • The study successfully demonstrates pattern formation driven by differential diffusion in a coupled reaction system.
  • Experimental observations are accurately reproduced by a simple model, validating the proposed mechanism.
  • This work provides insights into the fundamental principles governing pattern evolution in reactive systems.