Unboxing A Hoffman Apparatus - Make Your Own Hydrogen | SciWorx Chemistry

A Hoffman Apparatus is a piece of glass lab equipment that is great for electrolysis experiments, mostly used to generate hydrogen and oxygen from water. It is a really useful addition to your home lab.
A Hoffman Apparatus is an apparatus for electrolyzing water, invented by August Wilhelm von Hofmann (1818-1892) in 1866. It consists of three joined upright cylinders, usually glass. The inner cylinder is open at the top to allow addition of water and an ionic compound to improve conductivity, such as a small amount of sulfuric acid. A platinum electrode is placed inside the bottom of each of the two side cylinders, connected to the positive and negative terminals of a source of electricity. When current is run through Hoffmann's apparatus, gaseous oxygen forms at the anode and gaseous hydrogen at the cathode. Each gas displaces water and collects at the top of the two outer tubes.
#hydrogen #electrolysis #renewable
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Originally named 'voltameter,' was coined by Daniell, who shortened Faraday's original name of "volta-electrometer". Hofmann voltameters are no longer used as electrical measuring devices. However, before the invention of the ammeter, voltameters were often used to measure direct current, since current through a voltameter with iron or copper electrodes electroplates the cathode with an amount of metal from the anode directly proportional to the total coulombs of charge transferred (Faraday's law of electrolysis). The modern name is "electrochemical coulometer" or more popularly called a "Hoffman Apparatus." Although the correct spelling of Hofmann contains only one 'f' and two "n", it is often incorrectly depicted as Hoffman.

[@jjohnston94]

You might be interested in the last two or three videos from NightHawkinLight. He built a couple of examples of this device, for almost nothing, out of kitchen implements.

[@badsamaritan8223]

We all know that's just Ted Cruz in disguise!

[@jjohnston94]

@@badsamaritan8223 Ted Cruz' head would explode from the pressure of all that fact.

[@tammytrott]

Hi stormy just came from Jay's channel x

[@SciWorx]

Thanks Tammy! I hope you enjoyed the livestream!!!

[@tammytrott]

@@SciWorx I really do I find them so interesting 😊

[@Mystery-machine]

Don’t…. Hassle the Hoff!

[@jjohnston94]

Do I want to know what a Hasselhoff device is?

[@SciWorx]

@@jjohnston94 Yes you do!!!!