Qualification > Sciences
Chemistry Help needed!:-(
Christy:
--- Quote from: cockyxrocker on May 07, 2009, 09:15:33 am ---electrolysis of concentrated sodium chloride using carbon electrodes
the solution also contained litmus solution
What happened to the colour of solution around cathode
Why did this change take place?
If there is hydorgen produced at the cathode
then why would there be a colour change since hydrogen is a neutral gas...shouldnt it stay green?
I dont get it...
--- End quote ---
Chlorine and hydrogen leaves .. NaOH is left in the solution turning theu niversal indicator blue cause its a base and chlorine bleaches
twilight:
--- Quote from: yinyang on May 07, 2009, 08:10:17 pm ---you are wrong twilight in electrolysis the cation which is lower in the reactivity series i.e. hydrogen
concentration only effects which anion goes i.e. chlorine
when chlorine and hydrogen leave sodium hydroxide is left behind which is a base so litmus indicator turns blue.
--- End quote ---
sorry . :-[ my wrong
Naruto:
Guyz plzz help me out with the last question of chemistry paper6 Nov 2000
plzzzz explain the full answer because it is of 6 marks...and tell me this question is from which topic?
i have attached the link
Thanks
astarmathsandphysics:
Would it simply be that no more is formed?
I know nothing about chenistry but I find exam questions very predictable.
Naruto:
ummm...astar are you answering my question :-\
its the question no. 6 on the last page...about calcium carbonate
i think you checked the wrong question...but its ok you can check and tell me if you knw the answer.
thanks
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