Biology; Chemistry; Physics: Post your doubts here!

[Ahmedfj]

guys please tell me that ..........does copper deposits on carbon electrodes from CuSO4 solution .. and please tell teh reason ?? ... need help ASAP !!!!!

 

[Spidey21]

Spidey soonay jaa rahay ho ya ho abhi online?

ja raha tha par tumhare yaad ne bula liya!

 

[Spidey21]

guys please tell me that ..........does copper deposits on carbon electrodes from CuSO4 solution .. and please tell teh reason ?? ... need help ASAP !!!!!

in electrolysis??
yep.
Carbon electrodes are inert remember!!

 

[Tuba noor]

tomorrow is my bio test pray 4 me

 

[Ahmedfj]

in electrolysis??
yep.
Carbon electrodes are inert remember!!

if it is inert then why is there a deposit of copper and why hydrogen is not formed ?

 

[Spidey21]

if it is inert then why is there a deposit of copper and why hydrogen is not formed ?

hmm...i think you are right with Hydrogen being released and Copper not forming..

 

[Ahmedfj]

http://www.xtremepapers.com/papers/...l O Level/Chemistry (5070)/5070_s11_qp_11.pdf

mcq 38 please .. why isnt the answer A

 

[Ahmedfj]

hmm...i think you are right with Hydrogen being released and Copper not forming..

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Chemistry (5070)/5070_s11_qp_11.pdf

mcq 38 please .. why isnt the answer A

 

[Spidey21]

because it is C!!!

 

[syed1995]

in electrolysis??
yep.
Carbon electrodes are inert remember!!

Oye sab say mushkil topic chair doun ?

what is deposited on the anode if its not mentioned whether the solution is dilute or conc. (What will we assume the solution is )

btw no need to answer it .. hahaha just your comment is enough

 

[Spidey21]

Oye sab say mushkil topic chair doun ?

what is deposited on the anode if its not mentioned whether the solution is dilute or conc. (What will we assume the solution is )

btw no need to answer it .. hahaha just your comment is enough

..LOL...no one would mind!!

 

[Ahmedfj]

Oye sab say mushkil topic chair doun ?

what is deposited on the anode if its not mentioned whether the solution is dilute or conc. (What will we assume the solution is )

btw no need to answer it .. hahaha just your comment is enough

what is deposited ??

and
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Chemistry (5070)/5070_s11_qp_11.pdf

mcq 38 please .. why isnt the answer A
help pls

 

[Spidey21]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Chemistry (5070)/5070_s11_qp_11.pdf

mcq 38 please .. why isnt the answer A

Cathode reaction: Cu2+(aq) + 2e- → Cu(s)
Anode reaction: 2H2O(l) → O2(g) + 4H+(aq) + 4e-
This is the reaction in Carbon electrodes Copper Sulfate
and the answer to your MCQ is C!!

 

[syed1995]

NaCl .. mein kuch bhi hojaye .. unless the solution is specified to be DILUTE .. Cl hi deposit hogi on the anode .. likh kay rakh looo

 

[Ahmedfj]

Cathode reaction: Cu2+(aq) + 2e- → Cu(s)
Anode reaction: 2H2O(l) → O2(g) + 4H+(aq) + 4e-
This is the reaction in Carbon electrodes Copper Sulfate
and the answer to your MCQ is C!!

what is deposited on the anode if its not mentioned whether the solution is dilute or conc.

 

[Spidey21]

NaCl .. mein kuch bhi hojaye .. unless the solution is specified to be DILUTE .. Cl hi deposit hogi on the anode .. likh kay rakh looo

yar apko water cooler doon ya silai machine???

 

[Spidey21]

what is deposited on the anode if its not mentioned whether the solution is dilute or conc.

depends...its usually water but in Cl- case, as their reactivity is quite similiar, Cl is discharged!!
they mostly notify!!
me going
best of luck to u
and syed1995

 

[Ahmedfj]

NaCl .. mein kuch bhi hojaye .. unless the solution is specified to be DILUTE .. Cl hi deposit hogi on the anode .. likh kay rakh looo

what is flue gas desulfurisation and what are effects of greenhouse effect ?

 

[Ahmedfj]

depends...its usually water but in Cl- case, as their reactivity is quite similiar, Cl is discharged!!
they mostly notify!!
me going
best of luck to u
and syed1995

same to u dude

 

[Spidey21]

NaCl .. mein kuch bhi hojaye .. unless the solution is specified to be DILUTE .. Cl hi deposit hogi on the anode .. likh kay rakh looo

they dont allow to take the sheets in the exam hall!!