Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Ions as Acids and Bases02:54

Ions as Acids and Bases

23.6K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
23.6K
Polyprotic Acids03:38

Polyprotic Acids

29.0K
Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
29.0K
Bicarbonate-Carbonic Acid Buffer01:22

Bicarbonate-Carbonic Acid Buffer

860
The carbonic acid-bicarbonate buffer system is critical for maintaining the body's pH balance. It operates on the equilibrium:
860
Brønsted-Lowry Acids and Bases02:16

Brønsted-Lowry Acids and Bases

18.9K
In 1923, the Brønsted–Lowry definition of acids and bases was proposed by Johannes Brønsted and Thomas Lowry. According to this theory, a Brønsted acid is defined as a species that donates a proton in a chemical reaction and gets converted to its conjugate base. A Brønsted base is defined as a species that accepts a proton in a chemical reaction and gets converted into its conjugate acid. These transfers of protons are caused by the displacement of electrons in these reactions, which is...
18.9K
Relative Strengths of Conjugate Acid-Base Pairs02:29

Relative Strengths of Conjugate Acid-Base Pairs

45.3K
Brønsted-Lowry acid-base chemistry is the transfer of protons; thus, logic suggests a relation between the relative strengths of conjugate acid-base pairs. The strength of an acid or base is quantified in its ionization constant, Ka or Kb, which represents the extent of the acid or base ionization reaction. For the conjugate acid-base pair HA / A−, the ionization equilibrium equations and ionization constant expressions are
45.3K
Titration of Polyprotic Base with a Strong Acid01:18

Titration of Polyprotic Base with a Strong Acid

771
The titration of a polyprotic base such as sodium carbonate with a strong acid such as hydrochloric acid results in two equivalence points on the titration curve. At the first equivalence point, the carbonate ions in the base are completely converted to bicarbonate ions. The second equivalence point corresponds to the complete conversion of bicarbonate ions to carbonic acid, which dissociates into carbon dioxide and water. The region before the first equivalence point corresponds to the...
771

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Hydrated Electrons Bypass the -1.9 V Activation Barrier in Electrochemical CO<sub>2</sub> Reduction.

Journal of the American Chemical Society·2025
Same author

Hand-powered interfacial electric-field-enhanced water disinfection system.

Nature nanotechnology·2025
Same author

Bulk water redox chemistry enables radical-mediated C-C coupling in CO<sub>2</sub> electroreduction.

Nature chemistry·2025
Same author

Radical-mediated proton transfer enables hydroxyl radical formation in charge-delocalized water.

Chemical science·2025
Same author

Role of Plasma in Catalyst Preparation and Modification for Oxygen Evolution Reaction.

Precision chemistry·2025
Same author

A nearly transparent Ni-based oxygen-evolving catalyst for photoelectrocatalysis.

Chemical communications (Cambridge, England)·2025

相关实验视频

Updated: Jun 9, 2025

Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays
12:48

Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays

Published on: February 19, 2013

10.5K

双碳酸介导的质子转移需要阳离子.

Qianbao Wu1, Na Yang2, Mengjun Xiao1

  • 1Molecular Electrochemistry Laboratory, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, 611731, Chengdu, China.

Nature communications
|October 23, 2024
PubMed
概括

酸盐使二碳酸盐能够在近中性溶液中自我解离,从而促进CO2的水合和与水的氧同位素交换. 这揭示了对于生物和化学过程至关重要的酸二碳酸盐相互作用机制.

更多相关视频

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
07:38

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

Published on: March 30, 2015

9.2K
Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess
07:35

Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess

Published on: June 1, 2022

2.2K

相关实验视频

Last Updated: Jun 9, 2025

Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays
12:48

Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays

Published on: February 19, 2013

10.5K
Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
07:38

Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

Published on: March 30, 2015

9.2K
Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess
07:35

Assessment of Open Probability of the Mitochondrial Permeability Transition Pore in the Setting of Coenzyme Q Excess

Published on: June 1, 2022

2.2K

科学领域:

  • 环境化学环境化学
  • 生物地质化学生物地质化学
  • 物理化学 物理化学

背景情况:

  • 几乎中性二碳酸盐 (HCO3-) 溶液在生物和化学系统中至关重要.
  • 在质子缺乏条件下,化CO2,二碳酸盐 (HCO3-) 和碳酸盐 (CO32-) 之间的相互转换机制尚未完全理解.
  • 这些系统中的质子转移动态仍然是积极研究的领域.

研究的目的:

  • 阐明在近中性水溶液中二碳酸盐 (HCO3-) 解离中的子的作用.
  • 研究相关的质子转移和氧同位素交换机制.
  • 了解阳离子,二碳酸盐和水分子之间的相互作用.

主要方法:

  • 标有氧同位素的拉曼光谱法,用于跟踪二碳酸盐 (HCO3-) 和水 (H2O) 之间的氧同位素交换.
  • 使用皇冠来隔离二碳酸盐 (HCO3-) 离子,研究对解离的影响.
  • 分子动力学模拟用于研究水合酸盐和二碳酸盐 (HCO3-) 之间的相互作用.

主要成果:

  • 电离子促进二碳酸盐 (HCO3-) 独立于pH的自我解离,转化为氧化物 (OH-) 和二氧化碳 (CO2).
  • 二氧化碳的水合和随后的质子转移驱动双碳酸盐 (HCO3-) 和水 (H2O) 之间的氧同位素交换.
  • 使用皇冠以太从离子中分离二碳酸盐 (HCO3-) 抑制了解离和随后的反应,证实了离子的作用.

结论:

  • 这项研究揭示了一种新的机制,其中子使二碳酸盐 (HCO3-) 分离和随后在近中性溶液中的反应成为可能.
  • 这种阴阳二碳酸盐相互作用作为一种天然的质子通道,对于理解各种化学和生物过程至关重要.
  • 研究结果提供了有关碳酸盐物种在水环境中的基本化学的见解.