How Does a Hoffman Voltameter Work?

A Hofmann voltameter is an apparatus for electrolysing water, invented by August Wilhelm von Hofmann (1818–1892) in 1866. ... When current is run through Hofmann's voltameter, 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.

How does an electrolysis apparatus work?

Description: Water is decomposed into hydrogen and oxygen gases using electricity. A Hoffman electrolysis apparatus collects the two gases separately and shows the 2 to 1 ratio nicely. ... Hydrogen gas can be burned to produce a small pop sound and the oxygen can be used to re-ignite a glowing wooden splint.

What is Hoffman's voltmeter used for?

The Hoffman's Voltameter is used for demonstrating the chemical composition of water by volume and the electrochemical equivalent of hydrogen by electrolysis of water.