Hoffmann Voltmeter
Product Code : JL-LE-11376
The Hoffmann Voltmeter (SKU JL-LE-11376, Cat. No. JSS-474/037) is a Hofmann voltameter: the classic electrolysis apparatus for decomposing water into hydrogen and oxygen in front of a class. It comes with one pair of carbon and platinum electrodes, a clamp and stand and a glass stopcock, and is used in school and college chemistry to show the composition of water by electrolysis. Hydrogen gathers above the cathode and oxygen above the anode, so the two gas volumes can be compared directly on the tubes.
Specifications
The apparatus as listed:
| Product | Hoffmann Voltmeter |
| SKU | JL-LE-11376 |
| Cat. No. | JSS-474/037 |
| Type | Hofmann electrolysis apparatus |
| Electrodes | One pair of carbon and platinum electrodes |
| Support | Clamp and stand |
| Gas outlet | Glass stopcock |
| Power | External DC power source (not included) |
| Electrolyte | Water with molar sodium or potassium sulphate, or sulphuric acid |
Uses of the Hofmann voltameter
The listing names these demonstrations:
- Decomposition of water into hydrogen and oxygen, collected over the two electrodes in a 2:1 volume ratio
- Determining chemical composition by electrolysis
- Evaluating the electrochemical equivalent of hydrogen
Scope of supply and ordering
Supplied as the voltameter with its electrodes, clamp, stand and stopcock. It is set up vertically on the stand and its terminals are connected to a DC supply; the gases collected are tested with a lighted splint, so matches and the electrolyte chemicals are provided by the user. Numbers and packing are confirmed on the quotation.
Frequently asked questions
Which electrodes come with this Hofmann voltameter?
One pair of carbon and platinum electrodes.
What electrolyte is used for the electrolysis of water?
Water made conducting with molar sodium sulphate, potassium sulphate or sulphuric acid.
What power source does it need?
A DC power source connected to its terminals; the supply is ordered separately.
Related products
- Hoffman Voltameter PTFE with Electrodes
- Water Electrolysis Apparatus Hoffman Voltmeter
- Electrolysis Kit
- Voltameter
More electrochemistry apparatus is in our laboratory equipment range.
Request a quote
Ask for a price on the Hofmann voltameter through our contact page. For tender or project supply, see our tenders page.
