Hydrogen Ion
Hydrogen Ion - Related Videos
06:06
Hydrogenation
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2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the hydrogenation of chalcone as an example of an alkene hydrogenation reaction (Figure 1). In this experiment, palladium on carbon (Pd/C) will be used as a heterogeneous catalyst for the process. A balloon will be used to supply the hydrogen atmosphere. Figure 1: Diagram showing the hydrogenation of chalcone to 3-phenylpropiophenone.
08:56
Catalytic Reactor: Hydrogenation of Ethylene
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA The hydrogenation of ethylene (C2H4) to ethane (C2H6) has often been studied as a model reduction reaction in characterizing new metal catalysts.1-2 While supported nickel is not the most active metal catalyst for this reaction, it is active enough that reaction can take place at < 200°C. The reaction typically involves adsorbed, dissociated hydrogen (H2) reacting...
02:18
A Sensitive Visual Method for the Detection of Hydrogen Sulfide-Producing Bacteria
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2025
Source: Zhu, W., & Chu, W. Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria. J. Vis. Exp. (2022)This video demonstrates a sensitive visual method for the rapid detection of hydrogen sulfide–producing bacteria. A color change from yellow to black indicates bacterial activity through the formation of bismuth sulfide.
03:24
Common Ion Effect
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2020
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: This solubility equilibrium may be shifted left by the addition of either silver(I) or iodide ions, resulting in...
03:11
Precipitation of Ions
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2020
Predicting Precipitation The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is: It is important to realize that this equilibrium is established in any aqueous solution containing Ca2+ and CO32– ions, not just in a solution formed by saturating water with calcium carbonate. Consider, for example, mixing aqueous solutions of the soluble compounds sodium carbonate and calcium nitrate. If the concentrations of calcium and carbonate ions in the mixture...
FAQs
In aqueous chemistry, hydronium provides the molecular form through which proton transfer is represented. A proton associating with H2O changes the participating species from a bare charged hydrogen species to H3O+, so acid-base equations account for altered charge and bonding. This representation is important when interpreting acidity and hydrogen-ion activity in water.
Proton transfer changes more than the location of hydrogen: it can alter each molecular participant’s charge and bonding. Those changes determine which acid-base species are present and help explain why a reaction can proceed in a particular direction. Tracking the hydrogen-ion species therefore connects molecular proton exchange with chemical-equilibrium analysis.
pH is determined by hydrogen-ion activity, so it provides a chemical measure linked to the effective behavior of hydrogen ions in solution. Concentration measurements and activity considerations help researchers characterize acidity more accurately and compare solution conditions. This distinction is important when analyzing equilibria, interpreting acid-base reactions, or controlling chemical environments.
During an acid-base titration, following hydrogen-ion conditions as solutions react provides a chemical basis for comparing an unknown with a controlled addition. The changing acidity helps characterize the unknown solution and analyze the acid-base behavior of the reacting species. Thus, hydrogen-ion measurements turn proton-transfer chemistry into an analytical procedure.
Monitoring or controlling hydrogen-ion conditions allows a buffer system to be evaluated in terms of its ability to support a selected acidity during chemical work. This matters because many analytical and biochemical processes require attention to acid-base conditions. Hydrogen-ion activity supplies the measurable chemical variable used to assess and regulate that environment.
In solubility analysis, hydrogen-ion measurements help relate a solution’s acidity to the behavior of dissolved species. In broader equilibrium studies, the same information helps researchers characterize solution conditions and predict reaction direction. This makes hydrogen-ion analysis useful for connecting observable solution acidity with chemical changes in analytical and industrial systems.