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

Responses to Salt Stress02:02

Responses to Salt Stress

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
Gravimetry: Inorganic And Organic Precipitating Agents00:49

Gravimetry: Inorganic And Organic Precipitating Agents

In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
Precipitation Processes01:12

Precipitation Processes

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...
Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
Qualitative Analysis03:46

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
Washing, Drying, and Ignition of Precipitates00:52

Washing, Drying, and Ignition of Precipitates

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...

You might also read

Related Articles

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

Sort by
Same author

These 'master' proteins protect us from deadly mutations - and could inspire new drugs.

Nature·2026
Same author

The challengers<b>Traversal</b> <i>Maria Popova</i> Farrar, Straus and Giroux, 2026. 608 pp.

Science (New York, N.Y.)·2026
Same author

How the Royal Institution made science a seasonal spectacle.

Nature·2025
Same author

James D Watson: a cautionary tale.

Lancet (London, England)·2025
Same author

Economics Nobel prize won by researchers who showed how science boosts growth.

Nature·2025
Same author

RNA, Not DNA, Is the Key to Life: DNA holds our genetic blueprints, but its cousin, RNA, conducts our daily lives.

Scientific American·2025

Related Experiment Video

Updated: May 10, 2026

Valorization of the Red Seaweed Gracilaria gracilis Through a Biorefinery Approach
10:18

Valorization of the Red Seaweed Gracilaria gracilis Through a Biorefinery Approach

Published on: November 21, 2023

Concluding remarks: Cum grano salis.

Philip Ball

    Faraday Discussions
    |June 26, 2013
    PubMed
    Summary

    Hofmeister effects reveal the intricate role of solvents in cellular processes. Understanding these details offers deeper insights into cell and molecular biology mechanisms.

    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Physical Chemistry

    Background:

    • The Hofmeister series describes the effect of salts on the solubility and properties of macromolecules.
    • These effects are crucial for understanding protein folding, aggregation, and interactions within biological systems.
    • Solvent properties significantly influence biomolecular behavior.

    Purpose of the Study:

    • To elucidate the detailed mechanisms underlying Hofmeister effects.
    • To highlight the significance of Hofmeister effects in cell and molecular biology.
    • To provide a deeper understanding of the solvent's role in biological systems.

    Main Methods:

    • Review and synthesis of existing literature on Hofmeister effects.
    • Analysis of experimental data demonstrating salt-specific interactions.

    Related Experiment Videos

    Last Updated: May 10, 2026

    Valorization of the Red Seaweed Gracilaria gracilis Through a Biorefinery Approach
    10:18

    Valorization of the Red Seaweed Gracilaria gracilis Through a Biorefinery Approach

    Published on: November 21, 2023

  • Theoretical modeling of ion-water and ion-solute interactions.

    • Main Results:

    • Hofmeister effects are a fundamental aspect of solution behavior.
    • These effects are directly linked to the hydration and kosmotropic/chaotropic properties of ions.
    • Detailed understanding of these effects is critical for interpreting biological phenomena.

    Conclusions:

    • Hofmeister effects are integral to understanding solvent contributions in biology.
    • Further research into these detailed effects promises significant advancements in cell and molecular biology.
    • The solvent is not merely a medium but an active participant in biological processes.