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Related Concept Videos

Precipitation Titration Curve: Analysis01:21

Precipitation Titration Curve: Analysis

1.7K
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,...
1.7K
Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

4.6K
In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...
4.6K
Controlled-Current Coulometry: Coulometric Titration01:18

Controlled-Current Coulometry: Coulometric Titration

475
Coulometric titrations are a form of titrimetric analysis where the reagent is generated electrically, and its amount is evaluated based on current and generating time. The electron serves as the standard reagent. The procedure is similar to conventional titrations, such as endpoint detection.
The fundamental requirements for coulometric titrations are (1) 100% efficiency in the reagent-generating electrode reaction and (2) a stoichiometric and preferably rapid reaction between the generated...
475
Titrimetric Methods: Types and Commonly Used Strategies01:08

Titrimetric Methods: Types and Commonly Used Strategies

2.3K
In chemistry, titrimetric methods are broadly classified into three types: volumetric, gravimetric, and coulometric. Volumetric titrations involve measuring the volume of a titrant of known concentration that is required to react completely with an analyte. In gravimetric titrations, the standard solution reacts with the analyte to form an insoluble precipitate, which is filtered, dried, and weighed. In coulometric titrations, current is applied to an electrochemical reaction until the reaction...
2.3K
EDTA: Indirect and Alkalimetric Titration01:23

EDTA: Indirect and Alkalimetric Titration

1.7K
Unlike direct titration, back-titration, and displacement titration, indirect titration is an EDTA titration method for quantifying anions. In the indirect titration method, anions are precipitated as their insoluble salts with excess metal ions. The filtrate containing the excess metal ions is directly titrated with standard EDTA until the endpoint is achieved. Another approach involves extracting the metal ion and back-titrating with standard EDTA to obtain the endpoint. In this way, the...
1.7K
Coulometry: Overview01:00

Coulometry: Overview

2.2K
Coulometry is one of the rapid, most accurate, and precise analytical techniques that determine the quantity of an analyte by measuring the electrical charge needed for its complete electrolysis without using any analytical standards. The total charge passed during electrolysis correlates with the analyte amount by Faraday's laws of electrolysis. For accurate coulometric measurements, a charge equal to Faraday's constant multiplied by the number of electrons involved in the relevant...
2.2K

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Related Experiment Video

Updated: Jan 6, 2026

The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique
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The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique

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Precise Coulometric Titrations of Halides.

George Marinenko, John K Taylor

    Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
    |October 4, 2019
    PubMed
    Summary

    A new method precisely measures halides using constant-current coulometric titration. This technique achieves high accuracy, with a standard deviation of 0.005 percent for a 4 milliequivalents halide sample.

    Area of Science:

    • Analytical Chemistry
    • Electrochemistry

    Background:

    • Accurate halide determination is crucial in various scientific fields.
    • Traditional titration methods may have limitations in precision.

    Purpose of the Study:

    • To develop a precise and reliable method for halide assay.
    • To establish a new standard for coulometric titration of halides.

    Main Methods:

    • Constant-current coulometric titration utilizing silver ions.
    • Generation of silver ions at a silver anode for titration.
    • Titration of a 4 milliequivalents halide sample.

    Main Results:

    • Demonstrated a precise method for halide quantification.
    • Achieved a standard deviation of 0.005 percent in titration results.

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  • Validated the efficacy of in-situ silver ion generation.

    • Conclusions:

    • The developed method offers high precision for halide analysis.
    • Constant-current coulometric titration with electrogenerated silver ions is a robust technique.
    • This method provides a significant advancement in analytical accuracy for halide determination.