IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: Nasir69 on May 30, 2010, 09:45:08 am

Title: Chemistry : Paper 5 (AS/A2), CIE
Post by: Nasir69 on May 30, 2010, 09:45:08 am

I have doubt in Chemistry Paper, the details of the paper are given below, please anyone help me if you can....Thank you

9701/05/O/N/O8

Page 10, Question 2(e)

Title: Re: Chemistry : Paper 5 (AS/A2), CIE
Post by: osmosis on May 30, 2010, 09:57:12 am

from what I get....
the gradient of my graph is
m= 1.93-0.48/5760-1440
  = 0.000335648

Faraday constant= Q(C) / n(mol)
                       = Q/ [2x(m/63.5)]
      2F/63.5 x m = Q
                   m = 63.5Q/2F


Y= MX + C
   
therefore, m= 63.5/2F
0.000335645=63.5/2F
F= 94594
 = 9.5x10^5

i hope you understand....^_^

Title: Re: Chemistry : Paper 5 (AS/A2), CIE
Post by: osmosis on May 30, 2010, 10:04:06 am

9.5x10^4 Cmol^-1  :)

Title: Re: Chemistry : Paper 5 (AS/A2), CIE
Post by: hira on May 30, 2010, 02:34:13 pm

Please help me with this question...

M/J 08 Q2  F

how are we suppose to draw contruction lines on the graph to drive values.

PLEASE HELPPPPPPPPPPPP...REPLY FASTTT!

Title: Re: Chemistry : Paper 5 (AS/A2), CIE
Post by: hira on May 30, 2010, 02:46:11 pm

please reply fast
i have my exam tom  :'( :'( :'( :'(

Title: Re: Chemistry : Paper 5 (AS/A2), CIE
Post by: hira on May 30, 2010, 02:58:52 pm

no body online to help? :(

Title: Re: Chemistry : Paper 5 (AS/A2), CIE
Post by: hira on May 30, 2010, 03:36:53 pm

i really dont want to spam
but i am waiting for a reply :(
please help!