How to prove the water have chlorine?

Question

thanks

Answer 1

I could not find the right spelling in english but if you use orthotolidon indicator(Free Cl indicator) water gets yellow. That means it has Cl2 in it.

Answer 2

In order to determine the presence of chlorine in  a water sample use a powder or tablet chemical DPD (N,N diethyl-p-phenylenediamine) that causes a color change to pink in the presence of chlorine. An alternative is the use of o- tolidene solution which gives a yellow colour. These test indicators are easily available from any swimming pool supply company or if you know somebody with a swimming pool you can get some indicator from them.

Answer 3

You mean chloride in water?  If it is so, then you can use a drop of silver nitrate, which will precipitate chloride as white silver chloride.  Hope this solves your doubt.

Answer 4

electrolyse them? haha

i'm not sure myself.

there will be H, OH, Cl ions in the water with chlorine wouldnt it?

not sure. hehe