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I dont think there is a good chemical option to solve your problem, unless you do tests for particular contaminants, which is too much work. Relatively simple option is magnetic sputtering, or accelerator enrichment. It may sound complex, but there are youtube videos of people doing it with microwave parts, glass bottle, vacuum pump, silicone and some wire. ...

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It is unlikely that there is a simple method, not involving relatively expensive chemical analysis, for distinguishing 4N, 5N, and 6N copper specimens. Shown below is a photograph of some copper specimens I have: The evaporating dish contains copper shot, the large plate (4.76 mm thick) is OFHC (oxygen free high conductivity) copper and the third specimen ...

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"The temperature of liquid nitrogen (−195.8 °C) can readily be reduced to its freezing point −210 °C (−346 °F; 63 K) by placing it in a vacuum chamber pumped by a vacuum pump." Wikipedia A gas sampling tube: or perhaps even this: with a pressure meter attached could be used to take a sample, then the total pressure could be read after cooling ...

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There are commercial, calibrated, hydrogen detectors, such as those from GasSensing or from Mcmaster-Carr, but you'd have to check with the supplier or manufacturer to determine if the other gases give a false reading, or, particularly silanes, poison the sensing element. You can also make your own device using a sensing element, such as SGAS701 from Renesas,...

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[OP] Can I eliminate this parameter from the formula by assuming that at the endpoint all of the guests are consumed? No. At equilibrium, all species are present. If one of the reactants is depleted, the reaction went to completion, distinct from reaching equilibrium. Sometimes, you can neglect a species in a sum or a difference, but only in that sense. For ...

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It is not easy to bind an organic molecule to silicium oxide. It is necessary to synthesize the Si-O bond. It cannot be done starting from $\ce{SiO2}$. A possibility is to react $\ce{CH3Cl}$ over elementary silicium at high temperature to carry out the reaction : $\ce{2 CH3Cl + Si > Si(CH3)2Cl2}$. Another approach is to make methyl sodium $\ce{NaCH3}$ ...

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