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Weak Base Solutions

Weak Base Solutions

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...

Weak Acid Solutions

Weak Acid Solutions

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...

Titration of a Weak Acid with a Weak Base

Titration of a Weak Acid with a Weak Base

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...

Titration Calculations: Weak Acid - Strong Base

Titration Calculations: Weak Acid - Strong Base

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:

Conservation of Small Populations

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What is Population Genetics?

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Related Experiment Video

Updated: Feb 8, 2026

Collection and Long-Term Maintenance of Leaf-Cutting Ants Atta in Laboratory Conditions

Collection and Long-Term Maintenance of Leaf-Cutting Ants Atta in Laboratory Conditions

Published on: August 30, 2022

Weak population structure in the ant Formica fusca.

Helena Johansson¹, Perttu Seppä^1,2, Heikki Helanterä^1,2

¹Centre of Excellence in Biological Interactions, Organismal and Evolutionary Biology Research Programme, University of Helsinki, Helsinki, Finland.

|June 27, 2018

Summary

High dispersal in Formica fusca ants suggests they are pioneer species. Female ants migrate six times more than males, leading to weak population structure despite high dispersal rates.

Keywords:

Formica fusca Microsatellite Panmixia Sex-biased dispersal Social insect

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Last Updated: Feb 8, 2026

Collection and Long-Term Maintenance of Leaf-Cutting Ants Atta in Laboratory Conditions

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Published on: August 30, 2022

Visual Classical Conditioning in Wood Ants

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Published on: November 27, 2017

Area of Science:

Evolutionary biology
Population genetics
Behavioral ecology

Background:

Dispersal is a key species trait influencing population structure.
Weak dispersal promotes genetic differentiation, while high dispersal leads to panmixia.
Understanding sex-specific dispersal is crucial for evolutionary insights.

Purpose of the Study:

To investigate the genetic population structure of Formica fusca ants.
To determine the relative contribution of males and females to dispersal.
To assess the influence of dispersal on population differentiation.

Main Methods:

Collected samples from 12 localities across a 35 km² area in Finland.
Generated mitochondrial DNA (mtDNA) haplotype and microsatellite data.
Employed principal components analysis, Bayesian clustering, F statistics, and isolation-by-distance tests.

Main Results:

No significant spatial structure or isolation-by-distance was observed for either mtDNA or microsatellite data.
Mitochondrial differentiation (Fst-mt = 0.0047) was weaker than nuclear differentiation (Fst-nuc = 0.027).
Female migration rates were estimated to be six times higher than male migration rates.

Conclusions:

High dispersal rates in both sexes contribute to the weak population substructure of Formica fusca.
The findings align with Formica fusca's role as a pioneer species in unstable boreal forest habitats.
Sex-biased dispersal, with higher female mobility, shapes the genetic landscape of this ant species.