Like Dissolves Like
Like Dissolves Like - Related Videos
09:38
Dissolved Oxygen in Surface Water
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Dissolved oxygen (DO) measurements calculate the amount of gaseous oxygen dissolved in surface water, which is important to all oxygen-breathing life in river ecosystems, including fish species preferred for human consumption (e.g. bluegill and bass), as well as decomposer species critical to the recycling of biogeochemical materials in the system. The oxygen dissolved in lakes, rivers, and oceans is crucial for the...
06:20
A Simple Approach to Manipulate Dissolved Oxygen for Animal Behavior Observations
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Cited by 1 •
2016
This article describes a simple and reproducible protocol to manipulate dissolved oxygen conditions in a laboratory setting for animal behavior studies. This protocol may be used in both teaching and research laboratory settings to evaluate organismal response of macroinvertebrates, fishes, or amphibians to changes in dissolved oxygen concentration.
09:38
Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
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Cited by 3 •
2016
Dissolved organic matter provides an important source of energy and nutrients to stream ecosystems. Here we demonstrate a field-based method to manipulate the ambient pool of dissolved organic matter in situ through easily replicable nutrient pulses.
10:11
The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations
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Cited by 13 •
2016
Here, we present small core incubations for the measurement of sediment-water gas and solute exchange. These will provide reliable measurements of sediment-water exchange that assess the role of sediment in influencing biological and biogeochemical processes in aquatic ecosystems.
08:57
VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders
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Cited by 17 •
2016
We introduce the VacuSIP, a simple, non-intrusive, and reliable method for clean and accurate point sampling of water. The system was developed and evaluated for the simultaneous collection of the water inhaled and exhaled by benthic suspension feeders in situ, to cleanly measure removal and excretion of particulate and dissolved compounds.
FAQs
Polarity determines how strongly molecules interact with one another and with a solvent. A polar solute can be stabilized when the solvent provides compatible dipole-dipole attractions or hydrogen bonding, whereas a nonpolar solute depends more on dispersion forces. Dissolution becomes less favorable when the new solute-solvent interactions cannot adequately compensate for existing molecular attractions.
These interactions can stabilize dissolved polar molecules by providing attractive contacts throughout the mixture. Hydrogen bonding is especially relevant when both solute and solvent can participate, while dipole-dipole attraction connects permanently polar molecules. Their presence helps explain why a polar solvent may dissolve one compound effectively but perform poorly with a nonpolar compound.
A substantial mismatch weakens the tendency of the two substances to mix because the resulting solute-solvent attractions are less compatible with the interactions each substance maintains independently. The practical result is reduced solubility or incomplete mixing. Comparing these characteristics helps predict whether a compound is more likely to dissolve in water, an oil, or another organic solvent.
The principle helps researchers choose a solvent whose polarity and intermolecular forces are compatible with the compound they want to dissolve. In extraction, recrystallization, and chromatography, that choice influences which substances enter the solvent phase and which remain less soluble. Matching solvent and compound properties therefore supports separation, purification, and more controlled handling of chemical materials.
In recrystallization and chromatography, solubility differences are central to separating or purifying compounds. Selecting solvents with appropriate interaction characteristics helps control whether a substance dissolves, remains less soluble, or moves differently within the separation system. The principle does not replace experimental evaluation, but it provides a chemical basis for narrowing solvent choices and anticipating purification behavior.
Solvent compatibility affects whether a compound can be incorporated into a uniform mixture or handled as a separate phase. Like Dissolves Like provides an initial way to compare the compound with possible water-based, oil-based, or organic environments. This supports practical decisions about formulation and helps anticipate solubility problems before they interfere with processing or use.