Showing posts with label half equations. Show all posts
Showing posts with label half equations. Show all posts

Thursday, 16 May 2013

1.55 write ionic half-equations representing the reactions at the electrodes during electrolysis

Half equations

Half equations are written to show the chemical activity at the electrodes.

They need to be balanced for an exam

On the equations below, the first one is not balanced and the second has been. 

Al3+ + e → Al          Al3+ + 3e → Al