CHEM AND BIO HELP AND TIPS HERE

[igext]

@Larimeeva  Its alright, we all make mistakes and I can understand your frustration.

Good luck with your exam and all the best

Ari do we have to know conditions of rxns other than contact and haber?

[8T]

Could somene remind me if rust was oxidation or reduction please??

[Airhead]

I wanna roast it in air! (sorry lame)

Not lame - EPIC xD

I hope it's a good paper...I'm really worried about Chem :l

[The Golden Girl =D]

Ari do we have to know conditions of rxns other than contact and haber?

u need to kno crackin conditions as well as substitution reaction of alkAnes (halogenation)....... and addition polymerization

[igext]

Could somene remind me if rust was oxidation or reduction please??

Oxidation remember you reduce iron ore to form iron in a furnace

[igext]

u need to kno crackin conditions as well as substitution reaction of alkAnes (halogenation)....... and addition polymerization

what are they for crackin and polymerisation?
Thanx in advance

[The Golden Girl =D]

what are they for crackin and polymerisation?
Thanx in advance

for cracking :  the temp is  300 degree Celsius and the catalyst used is Alo3  

oh and there is also Hydration : u add steam to ethene at abt 700 degree celcius , with the presence of a phosphoric catalyst and at 60 atmospheric pressure

addition ploy : 200 atmospheric pressure & 150 degree Celsius

hope i didn't forget anythin ....sure mate

[Vin]

Um, in my book for cracking its 540*C and yeah typo Al2O3

[The Golden Girl =D]

Um, in my book for cracking its 540*C and yeah typo Al2O3

it's okay ..main point that it has a high temp ..nah actually in my book it says 700 lol

[igext]

for cracking :  the temp is  300 degree Celsius and the catalyst used is Alo3  

oh and there is also Hydration : u add steam to ethene at abt 700 degree celcius , with the presence of a phosphoric catalyst and at 60 atmospheric pressure

addition ploy : 200 atmospheric pressure & 150 degree Celsius

hope i didn't forget anythin ....sure mate

isnt there a catalyst for addition poly?

[sarasa]

Hmm, I'm pretty sure reaction invovling hydrogen happens at cathode and likewise for oxygen at the anode.  I guess the diagram I chose was a bit weird, because if you look carefully, there are the - sign in hydrogen and + in oxygen.

My 'case' for this is also exemplified by this link:

http://inventors.about.com/od/sstartinventions/ss/Physics_Illustr_2.htm

http://t1.gstatic.com/images?q=tbn:sT3pyEjo873ioM:http://205.153.241.230/issues/emergeoct2005/fuelcell.jpg
IT IS WRITTEN ANODE....! Told ya, it is not da same as eletrolysis which means yeah it would become negatively charged as electrons r lost by da H2 nd so flow from it to da other electrode. HOWEVER, it is da anode, da HYDROGEN FUEL CELL is different.....!

[The Golden Girl =D]

isnt there a catalyst for addition poly?

of what i know is that it does NOT

[sarasa]

See this diagram. I found it pretty good.

CHeck this
 https://studentforums.biz/index.php/topic,1744.msg136892.html#msg136892

[NidZ- Hero]

Could somene remind me if rust was oxidation or reduction please??

iron is reduced

[8T]

Oxidation remember you reduce iron ore to form iron in a furnace

Thanks for the reminder xD