Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
nid404:
--- Quote from: Amr Fouad on April 10, 2010, 07:47:57 am ---anytime...Sorry for answering the question ;D..i know u rock at chemistry..but i just wanted to help ;D
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lol...I need help...I have to many questions to answer.. Happy to get a helping hand :D
nid404:
--- Quote from: saleemsamer on April 10, 2010, 09:33:31 am ---hey nid
do u have a good resource for the topic of The Mole Concept.
these qs in the exam drive me crazy.
Also The equilibrium concept
thx in advance
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check the attachment :)
This should be enough
Dark Prince:
--- Quote from: Ari Ben Canaan on April 10, 2010, 04:45:21 am ---1.) I think your refering to the electrolysis of conc. NaCl. The membrane allows Na+ ions to move to the right of the cell to meet OH- ions
2.) Its both. In an exam you give any as your answer. The Zn displaces Cu from its salt at the same time losing 2 electrons to Cu2+ to form Cu metal.
3.) ill be back...
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Why doesnt the OH ions move towards anode while da Na ions move 2ward cathode.......How does da membrane only allows Na 2 pass thru..?
DEGO:
--- Quote from: hotmail16 on April 10, 2010, 10:42:08 am ---Why doesnt the OH ions move towards anode while da Na ions move 2ward cathode.......How does da membrane only allows Na 2 pass thru..?
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membrane allow small particles and ions only which is hte NA ions thts all
DEGO:
--- Quote from: hotmail16 on April 09, 2010, 10:22:50 pm ---Hi, iwant 2 ask a few Qs
1. what is de main function of porus membrane in a membrane cell (electrolysis)
2. Is this a redox or displacement reaction....Zn + CuSO4 -- ZnSO4 +Cu ?
3. How does afuel cell worf (hydrogen nd O2)?
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3)the combustion of hydrogen(by oxygen) produce energy +water
2H2-4e=4H+ (oxidation)
4H+ + O2 + 4e = 2h2o (reduction)
so the overall is
2h2+ o2 = 2H2O
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