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CHEM AND BIO HELP AND TIPS HERE

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Usman B.Aamir:
Can some1 explain Question 13...Paper 1....Oct/Nov 2009....
the colour at the anode and cathodes are confusing :S....
when chlorine will turn the universdal indicator colourless at the anode then how can hydrogen change the colour of universal indicator to blu/purple...???? :S:S
i need a good explanation for this ...if some1 is kind enough.... :D :D
thnkss in advance....

nid404:
Chlorine bleaches the indicator at the anode. When Hydrogen gas escapes at cathode, remaining solution is sodium hydroxide which is alkaline and will turn the indicator blue/purple

Saladin:
y english?

nid404:

--- Quote from: The Dude 321 on March 15, 2010, 02:18:40 pm ---y english?

--- End quote ---

I beg your pardon...I didn't quite get that

Saladin:
y did u chose english at A level??

Are u first language??

Or do u just like it

or is it required for the course u wish to take at uni.

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