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相关概念视频

Titrimetric Methods: Types and Commonly Used Strategies01:08

Titrimetric Methods: Types and Commonly Used Strategies

929
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...
929
Acid-Base Titration Curves02:23

Acid-Base Titration Curves

128.0K
A titration curve is a plot of some solution property versus the amount of added titrant. For acid-base titrations, solution pH is a useful property to monitor because it varies predictably with the solution composition and, therefore, may be used to monitor the titration’s progress and detect its endpoint. Acid-base titration can be performed with a strong acid and a strong base, a strong acid and a weak base, or a strong base and a weak acid.
For a titration carried out for 25.00 mL of...
128.0K
Precipitation Titration: Overview01:26

Precipitation Titration: Overview

6.7K
Precipitation titration involves the reaction of a titrant and an analyte to generate an insoluble precipitate. While precipitation titration uses various precipitating agents, silver nitrate is the most common precipitating reagent; titrations involving Ag+ are called argentometric titrations. Usually, the endpoint in a precipitation titration can be detected by visual indicators.
A precipitation titration curve demonstrates the change in concentration of the titrant or analyte upon adding the...
6.7K
EDTA: Indirect and Alkalimetric Titration01:23

EDTA: Indirect and Alkalimetric Titration

938
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...
938
EDTA: Direct, Back-, and Displacement Titration01:30

EDTA: Direct, Back-, and Displacement Titration

2.8K
The EDTA titration types for metal ion analysis include direct titration, back-titration, and replacement titration.
Direct titration involves buffering the metal ion solution to the desired pH and directly titrating with standard EDTA until the endpoint. The optimum pH ensures a large conditional formation constant of metal−EDTA and visibility of the free indicator color in the solution. In addition, auxiliary complexing reagents are used to prevent the precipitation of metal hydroxides...
2.8K
Complexometric Titration: Overview00:39

Complexometric Titration: Overview

7.2K
Complexometric titration involves the formation of a complex by reacting a metal ion with one or more ligands. A visual indicator often detects the end point of a complexometric titration. It is added to the metal solution before the titration, forming a stable metal–indicator complex and imparting color to the solution. As the titration approaches the equivalence point, the excess of the added ligand displaces the indicator from the metal–indicator complex, releasing the free...
7.2K

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相关实验视频

Updated: Jul 9, 2025

Collecting Variable-concentration Isothermal Titration Calorimetry Datasets in Order to Determine Binding Mechanisms
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Collecting Variable-concentration Isothermal Titration Calorimetry Datasets in Order to Determine Binding Mechanisms

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规范定位模拟的规范定位模拟.

Amin Bakhshandeh1, Yan Levin1

  • 1Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil. levin@if.ufrgs.br.

Physical chemistry chemical physics : PCCP
|November 30, 2023
PubMed
概括
此摘要是机器生成的。

我们开发了一种新的蒙特卡洛模拟方法,用于定位. 这种方法准确计算了法典系统中的分子质子化状态和pH值,克服了以前的大法典方法的局限性.

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Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores
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Measuring Enzymatic Stability by Isothermal Titration Calorimetry
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Measuring Enzymatic Stability by Isothermal Titration Calorimetry

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Collecting Variable-concentration Isothermal Titration Calorimetry Datasets in Order to Determine Binding Mechanisms
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Collecting Variable-concentration Isothermal Titration Calorimetry Datasets in Order to Determine Binding Mechanisms

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Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores
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科学领域:

  • 计算化学计算化学
  • 分子动力学分子动力学
  • 生物物理学的生物物理.

背景情况:

  • 标准恒定pH (cpH) 模拟是大法典,将系统质子与水库pH联系起来.
  • 唐南电位在水库和隔离系统之间的pH值之间产生差异.
  • 准确的pH测定对于理解生物分子行为至关重要.

研究的目的:

  • 引入一种新的蒙特卡洛方法,用于规范组合中的定位模拟.
  • 克服现有方法在确定孤立系统的质子化状态和pH值方面的局限性.
  • 为了提供一个更准确的方法来计算法典系统的pH值.

主要方法:

  • 使用正规的反应性蒙特卡洛算法,根据质子总数来确定分子质子化状态.
  • 使用表面插入Widom算法计算系统pH值,避免在更高pH值时大量插入的问题.
  • 实施Ewald总和和Bethe潜力来准确处理远程库伦比力.

主要成果:

  • 这种新方法成功地计算了宏分子的质子化状态作为内部质子数的函数.
  • 表面插入Widom算法有效地确定了多种值的pH值,包括中间和高pH值.
  • 埃瓦尔德和Bethe电位的总和被证明是正规系统中准确的pH值计算的必要条件.

结论:

  • 提出的蒙特卡洛方法为定位模拟提供了一个强大的替代大规范方法.
  • 这种方法可以准确地确定孤立系统的质子化状态和pH值,这对于分子模拟至关重要.
  • 这些发现强调了适当处理静电相互作用对于可靠的pH值计算的重要性.