Qualification > Sciences
Chemistry doubt
Vin:
--- Quote from: nerdvictim on May 24, 2010, 03:32:26 pm ---:P i sure will! thank you ;D
--- End quote ---
sure .. ;) your welcome
The Golden Girl =D:
--- Quote from: ~VIN1094~ on May 24, 2010, 11:10:54 am ---Ok remember when concentrated NaCl is electrolyzed:
First the solution contains Na+ Cl- and H+ and OH- (from water). The positive inos go to the cathode, and negative ions to the anode.
At the CATHODE
the H+ ions accept electrons, since it is less reactive than Na (always elements which is more reactive 'likes' to stay in the ionic form)
2H+ + 2e- ---> H2
At the ANODE
the Cl- ions give up the electrons more readily than the OH- ions do.
2Cl- --> Cl2 + 2e-
what left in the solution is Na+ and OH- which combine to form NaOH
in your ques ..is 'D' .. the indicator solution turns blue at -ve as NaOH is produced .. Chlorine doesnt show any change in presence of an indicator solution ;)
jus understand the concept ..
--- End quote ---
u said H2 goes to cathode , then y u said sodium hydroxide changes indicator to blue when it is at the bottom not even close to the +ve electrode
Ghost Of Highbury:
--- Quote from: ~VIN1094~ on May 24, 2010, 11:10:54 am ---Ok remember when concentrated NaCl is electrolyzed:
First the solution contains Na+ Cl- and H+ and OH- (from water). The positive inos go to the cathode, and negative ions to the anode.
At the CATHODE
the H+ ions accept electrons, since it is less reactive than Na (always elements which is more reactive 'likes' to stay in the ionic form)
2H+ + 2e- ---> H2
At the ANODE
the Cl- ions give up the electrons more readily than the OH- ions do.
2Cl- --> Cl2 + 2e-
what left in the solution is Na+ and OH- which combine to form NaOH
in your ques ..is 'D' .. the indicator solution turns blue at -ve as NaOH is produced .. Chlorine doesnt show any change in presence of an indicator solution ;)
jus understand the concept ..
--- End quote ---
it isnt concentrated, its aqueous .!!!
Vin:
--- Quote from: A@di on May 24, 2010, 06:41:15 pm ---it isnt concentrated, its aqueous .!!!
--- End quote ---
AADI U GAVE ME AN ATTACK !! ITS CONCENTRATED AQ. NaCl
8T:
hi By the way below copper theres mercury Hg
i have a question mj 04 p1 q 30
why is the answer C?
can sum1 explain plz
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