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Related Concept Videos

Weak Base Solutions03:21

Weak Base Solutions

24.9K
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
24.9K
Weak Acid Solutions04:02

Weak Acid Solutions

42.3K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
42.3K
Titration of a Weak Acid with a Weak Base01:08

Titration of a Weak Acid with a Weak Base

4.8K
Weak acids and bases do not undergo dissociation completely, and titrations between these two are rarely studied. When such studies are performed, say, for the titration of a weak acid with a weak base, the titration curve plots the change in pH as a function of the volume of base added. Take the titration of acetic acid with ammonia, for instance. During the titration, these two species form ammonium acetate and water, but the pH change is slow and gradual.
As a result, there is no simple...
4.8K
Titration Calculations: Weak Acid - Strong Base03:55

Titration Calculations: Weak Acid - Strong Base

49.1K
Calculating pH for Titration Solutions: Weak Acid/Strong Base
For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be represented as:
49.1K
Titration of a Weak Acid with a Strong Base01:30

Titration of a Weak Acid with a Strong Base

4.3K
In titrating a weak acid with a strong base, different calculation methods are applied at various stages. Initially, the pH of a weak acid like acetic acid is calculated using its dissociation constant (Ka) and an ICE table. Upon addition of a strong base such as sodium hydroxide, a buffer forms, and its pH is determined using the Henderson-Hasselbalch equation. As more base is added and the titration reaches the halfway point, the pH becomes equal to the pKa of the acid, indicating equal...
4.3K
Titration of a Weak Base with a Strong Acid01:20

Titration of a Weak Base with a Strong Acid

8.6K
The titration curve of a weak base like ammonia with a strong acid like hydrochloric acid is the mirror image of the titration curve of a weak acid with a strong base.
Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...
8.6K

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Fabrication of Thin Film Silver/Silver Chloride Electrodes with Finely Controlled Single Layer Silver Chloride
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Probing the weak interaction between silver and boron.

Hyun Wook Choi1, Deniz Kahraman1, Wei-Jia Chen1

  • 1Department of Chemistry, Brown University Providence RI 02912 USA Lai-Sheng_Wang@brown.edu.

Chemical Science
|January 21, 2026
PubMed
Summary
This summary is machine-generated.

Silver interacts very weakly with boron, forming a AgB8- cluster. This weak interaction explains why silver is the least reactive substrate for growing borophene, a key material in nanotechnology.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Computational Chemistry

Background:

  • Borophene synthesis on coinage metals is crucial for its applications.
  • Understanding metal-boron interactions is key to controlling borophene nucleation and growth.
  • Binary metal-boron clusters serve as model systems for atomic-level insights.

Purpose of the Study:

  • Investigate the structure and bonding of the AgB8- cluster.
  • Gain insight into the interaction between boron and silver, a highly inert substrate for borophene growth.
  • Compare the Ag-B interaction with those of other coinage metals (Cu, Au).

Main Methods:

  • Photoelectron spectroscopy to probe electronic structure.
  • Quantum chemical calculations to determine cluster structure and bonding.
  • Chemical bonding analyses to quantify metal-boron interactions.

Main Results:

  • AgB8- spectra are similar to bare B8-, indicating weak Ag-B interaction.
  • The AgB8- cluster features a B8 borozene weakly interacting with a Ag atom.
  • Ag interacts with B8 primarily via its 5s orbital with minimal perturbation to the B8 structure.
  • Ag exhibits the weakest interaction with B8 among coinage metals.

Conclusions:

  • Silver's inertness in borophene synthesis is attributed to its extremely weak interaction with boron.
  • The AgB8- cluster model accurately reflects the weak bonding observed on silver surfaces.
  • Findings provide fundamental understanding for designing borophene growth strategies on coinage metal substrates.