University:
Swansea University
Course:
EGA109 | Introductory Organic Chemistry
Academic year:

2023
Views:

172

Pages:

1
Author:

Sanjeev K

Eachnlytic Decomposition of waterA pair of inent electrodes are dipped into solution byapplying a voltage between them results inrapid evolution of bubbles of H2 and O2.Due to very poor electrical conductivity ofpure water, a small amount of am ionicstate(such as 12204 or Naz 5.04) is added to increaseitselectrical conductivityElectrolytes ane chosen such a may thatthe ions that are Garder to oxidize orreduce than water.Cathode 4Ht(aq) + 4e2 H2(g)Amode : 21420 O2(g) + 4H+ + 4eOverall : 2th2O2(g) + 2th (g)SemiconductorsIt's a substance, usually a solid chemicalelement or compound that can conductelectricity under some conditions but not others,making it a good medium for the controlof electrical current.It has an almost filled valence band, emptyconductionband and a very narrow owenergy gap ie,of the order of 1ev. Energy gap of sily Ge ( cy o-Fer