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Related Concept Videos

Titration Calculations: Weak Acid - Strong Base03:55

Titration Calculations: Weak Acid - Strong Base

49.3K
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:
49.3K
Titration of a Weak Base with a Strong Acid01:20

Titration of a Weak Base with a Strong Acid

9.0K
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...
9.0K
Titration of a Weak Acid with a Strong Base01:30

Titration of a Weak Acid with a Strong Base

4.5K
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...
4.5K
Weak Base Solutions03:21

Weak Base Solutions

25.2K
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...
25.2K
Titration Calculations: Strong Acid - Strong Base02:28

Titration Calculations: Strong Acid - Strong Base

33.9K
Calculating pH for Titration Solutions: Strong Acid/Strong Base
A titration is carried out for 25.00 mL of 0.100 M HCl (strong acid) with 0.100 M of a strong base NaOH. The pH at different volumes of added base solution can be calculated as follows:
(a) Titrant volume = 0 mL. The solution pH is due to the acid ionization of HCl. Because this is a strong acid, the ionization is complete and the hydronium ion molarity is 0.100 M. The pH of the solution is then:
33.9K
Weak Acid Solutions04:02

Weak Acid Solutions

43.1K
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...
43.1K

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Updated: Feb 4, 2026

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by &#960;-&#960; Stacking Interactions
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

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Assisted π-stacking: a strong synergy between weak interactions.

Soumik Sao1, Sumit Naskar1, Narottam Mukhopadhyay1

  • 1Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India. dchaudhuri@iiserkol.ac.in.

Chemical Communications (Cambridge, England)
|October 11, 2018
PubMed
Summary
This summary is machine-generated.

Assisted π-stacking, a synergy between aromatic π-stacking and n →π* interactions, offers enhanced strength and thermal stability for molecular self-assembly. This interaction

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Area of Science:

  • Supramolecular chemistry
  • Materials science
  • Chemical physics

Background:

  • Molecular self-assembly relies on non-covalent interactions.
  • Understanding synergistic effects is crucial for controlling assembly pathways.

Purpose of the Study:

  • To introduce and characterize assisted π-stacking.
  • To investigate the synergy between aromatic π-stacking and n →π* interactions.
  • To determine the strength and stability of this novel interaction.

Main Methods:

  • Computational analysis using Natural Bond Orbital (NBO).
  • Characterization of molecular self-assembly pathways.
  • Thermal stability assessments.

Main Results:

  • Assisted π-stacking demonstrates unprecedented strength and thermal stability.
  • The synergy between aromatic π-stacking and n →π* interactions is non-additive.
  • Specific self-assembly pathways are predisposed by this interaction.

Conclusions:

  • Assisted π-stacking is a powerful strategy for designing stable molecular assemblies.
  • The non-additive nature of the interaction provides new insights into supramolecular chemistry.
  • This finding has implications for materials science and nanotechnology.