File:Electrolysis.svg

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Summary

Description

English: Simple setup for demonstration of electrolysis of water at home.

You will need:

A glass of water
Two pencils sharpened at both ends
Either 9 volt battery or 9-12 V DC adapter.
Some bits of wire
Tape to fix things together
A teaspoon-full of table salt

After you connect everything, bubbles will form at the tips of pencils immediately.

Oxygen gas bubbles (O₂) will form at + electrode named anode.

Hydrogen gas bubbles H₂ will form at - electrode named cathode. The amount will be twice the amount of O₂.

Pure water is an insulator and the electrolysis may proceed too slowly. Some will say Sulfuric acid or NaSo4 is better, but those are not readily available outside labs. Sulfuric acid is also dangerous to handle. Table salt will suffice for the purpose of this demonstration. Using NaCl as an electrolyte results in some impurity in the form of chlorine gas at anode but that should not be important for the purpose of this demo.

Some things to vary:

Try stripping the pencil lead (graphite) from the wood to increase the area of contact with water.
Try the to see what happens if you vary water temperature.

Date

July 2010

Source

Own work

Author

Nevit Dilmen (talk)

Permission
(Reusing this file)

I, the copyright holder of this work, hereby publish it under the following licenses:

This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.

Attribution: © Nevit Dilmen

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	Date/Time	Dimensions	User	Comment
current	10:00, 7 March 2015	976 × 937 (42 KB)	Goran tek-en	0(zero) to O (capital O)
	09:48, 20 August 2011	976 × 937 (50 KB)	Nevit	border
	09:27, 20 August 2011	872 × 819 (46 KB)	Nevit	txt 2 path
	09:25, 20 August 2011	872 × 819 (32 KB)	Nevit	fixes
	19:48, 20 July 2010	872 × 819 (32 KB)	Nevit	{{Information \|Description=Basic setup for demonstration of electrolysis of water at home. \|Source={{own}} \|Date=2010 07 \|Author=Nevit \|Permission= \|other_versions= }} Category:Electrolysis Category:Nevit Dilmen SVG