Episode #125 of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now
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Who was responsible for this naming system and how can we change it? Michael Faraday was responsible for the terms anode and cathode more than hundred years ago. All the confusion regarding the nomenclature will vanish if you do not associate electrostatic signs with these two terms. One should identify the electrode labels with the redox processes rather ...


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Chromatography is really an empirical science. The fluid mechanical side and the adsorption phenomenon is somewhat well understood but choosing mobile phases is essentially based on trials, sadly to date. If someone has given you a ratio, say 8:2, it means someone must have tried it and they found that this mobile phase works the best. The main criterion for ...


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For currents in biological systems the magnetic field is minuscule, and likely has no physiological effect. That said, magnetoencephalography is based on measuring the tiny magnetic fields created when nerves fire. Detection requires an incredibly sensitive detector, a superconducting quantum interference device (SQUID), to detect the location of the ...


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I think you are simply misunderstanding the "uncharged to charged" part of the question. Imidazole is a base, so it gains a proton to become charged when the pH < pKa. That's why you got the right answer when you used $\ce{HA+}$ as the acid, as you put it. In this case, unlike with most general chemistry problems of this nature, the acid is charged while ...


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The answer given by @M. Farooq may be interpreted as «the optimization of TLC depends on the choice of the eluents used, which till now (by broader advent of machine learning) was empirical». In my opinion, this should not the impression to retain. Of course the optimization of TLC depends 1) on the eluent / eluent mixture, but should be seen in context of ...


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I can give a very pictorial answer that doesn't require the use of actual pictures nor typesetting and might useful for beginners. It is all about the misconception, encountered even in chemists with a relative experience in successful experiments, that solubility of the compounds in a mixture is a key factor for their effective chromatographic separation ...


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The good mnemonic tool to remember is : Anode = anabasis, electrons would be going upwards from the electrode to the wire = oxidation, ( Xenophon, Anabasis, 404BC, "The journey upwards(to north)) Cathode = cathabasis(the journey downwards), electrons would be going downwards from the wire to the electrode = reduction That means a cathode/anode is the ...


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In the United States, sucralose is sold under the brand Splenda. There is a liquid product with the food label shown below: The low calorie sweeteners in solid (powder) form containing sucralose come in different form, and they often contain sugars with calories. Here is one example: It contains glucose as the main ingredient. Nevertheless, they are ...


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