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関連する概念動画

Water: A Bronsted-Lowry Acid and Base02:30

Water: A Bronsted-Lowry Acid and Base

The reaction between a Brønsted-Lowry acid and water is called acid ionization. For example, when hydrogen fluoride dissolves in water and ionizes, protons are transferred from hydrogen fluoride molecules to water molecules, yielding hydronium ions and fluoride ions:
Ions as Acids and Bases02:54

Ions as Acids and Bases

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:
Determining the pH of Salt Solutions04:08

Determining the pH of Salt Solutions

The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
Polyprotic Acids03:38

Polyprotic Acids

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:
Common Ion Effect03:24

Common Ion Effect

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
Titration of Polyprotic Base with a Strong Acid01:18

Titration of Polyprotic Base with a Strong Acid

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...

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関連する実験動画

Updated: Jul 7, 2026

Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy
09:46

Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy

Published on: April 28, 2014

水溶液中の安定した5および6座標のシリケートアニオン.

S D Kinrade1, J W Del Nin, A S Schach

  • 1Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada P7B 5E1. Stephen.Kinrade@lakeheadu.ca

Science (New York, N.Y.)
|September 8, 1999
PubMed
まとめ

単純な砂糖のような分子は,水の中で安定したシリコン複合体を形成します. この発見は,シリコンに関する理論を裏付けている.

科学分野:

  • 化学 化学は化学です.
  • バイオケミストリー バイオケミストリー
  • 地質学 地質学 地質学

背景:

  • シリコンは,生物学的システムと地質学的プロセスにおいて不可欠である.
  • シリコンの水性化学を理解することは,様々な科学分野にとって極めて重要です.

研究 の 目的:

  • 水溶液中の安定したシリコン-ポリオール複合体の形成を調査する.
  • シリコンの協調化学におけるポリオールの役割を調査する.

主な方法:

  • 水性シリケート溶液は,アリファティックポリオールと反応した.
  • その結果生成されたポリオラート複合物の特徴づけが行われました.

主要な成果:

  • 高濃度の安定した5つまたは6つの調整されたシリコンポリオラート複合体の形成がありました.
  • トレオ構成を含む少なくとも4つのヒドロキシル基を持つポリオールは,シリコンと効果的に調整されています.
  • 調整は,threoペアに隣接するヒドロキシル酸素経由で発生した.

結論:

  • アリファティックポリオールは,水中に超有価のシリコン複合体を容易に形成します.

さらに関連する動画

Sedimentation Equilibrium of a Small Oligomer-forming Membrane Protein: Effect of Histidine Protonation on Pentameric Stability
09:49

Sedimentation Equilibrium of a Small Oligomer-forming Membrane Protein: Effect of Histidine Protonation on Pentameric Stability

Published on: April 2, 2015

Highly Stable, Functional Hairy Nanoparticles and Biopolymers from Wood Fibers: Towards Sustainable Nanotechnology
11:32

Highly Stable, Functional Hairy Nanoparticles and Biopolymers from Wood Fibers: Towards Sustainable Nanotechnology

Published on: July 20, 2016

関連する実験動画

Last Updated: Jul 7, 2026

Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy
09:46

Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy

Published on: April 28, 2014

Sedimentation Equilibrium of a Small Oligomer-forming Membrane Protein: Effect of Histidine Protonation on Pentameric Stability
09:49

Sedimentation Equilibrium of a Small Oligomer-forming Membrane Protein: Effect of Histidine Protonation on Pentameric Stability

Published on: April 2, 2015

Highly Stable, Functional Hairy Nanoparticles and Biopolymers from Wood Fibers: Towards Sustainable Nanotechnology
11:32

Highly Stable, Functional Hairy Nanoparticles and Biopolymers from Wood Fibers: Towards Sustainable Nanotechnology

Published on: July 20, 2016

  • これらの複合体は,生物学的シリコン輸送と鉱物ダイアゲネシスにおいて重要な役割を果たしている可能性が高い.