Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Extraction of chlorine and iodine
Member rating: No Rating | Words: | Submitted: Wed Aug 20 2003
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
Open-book: Extraction of chlorine and iodine In the membrane cell an electric current is passed through circulating brine, on one side the brine is in contact with an anode and chlorine is liberated from chlorine ions producing chlorine gas. 2Cl (aq) Cl2(g) + 2e Figure 1 (1) the reaction at the anode. Here the chlorine ions have been oxidised to form chlorine atoms and have produced free electrons. In the cathode reaction reduction occurs, the hydrogen atom in water is reduced at the electrode. A steel cathode supplies electrons to the water to liberate hydrogen gas and hydroxide ions. So the hydrogen gas produced has been oxidised and the hydroxide ions produced by reduction of water molecules. 2H2O(l) + 2e H2(g) + 2OH (aq) Figure 2 (2) the reaction at the cathode Both reactions show a redox reactions occurring, where by electrons are transferred from one species of an atom to another...
Get instant access
- Instant, unlimited access to our documents in full
- Swap your work for free access, or pay £4.99
- To see the full version of this document and 146,871 others
Receive email updates for this category
- Simply tell us your email address and receive a weekly Study Help Email for FREE
- Receive 3 FREE essay views with each email
- Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk
