thank you so much for replying,I really appreciate it. I shall write up the experiment plan, focusing on the physics side as you mentioned and present to my teacher and see what he thinks.
and thanks so much for for mentioning the latter 'deadly chlorine gas' part, it slipped my mind. if I do...
After summer I have to do my physics A2 experiment coursework. I really like working with electricity and looking at what happens at an atomic level, but I fear that what I want too do is more chemistry than physics.
I had the idea of look at electrical conductance through a salt solution...