Chemsitry Paper 31!!!!

[raiyanfarrukh]

yes i wrote that too plus there might be some dust in the apparatus used so washin them with distilled water will decrease errors but dude can u tell me how the 9 marks on the table is calculated?

I think u will get three marks for column headings plus units and i don't know rest of the marks how it is distributed

 

[Duamask]

for minimum time i got 24 and my maximum time was 80-83 and in the second part of the question in which we had to increase the vol of fa3 i got around 150 wbu? what u got for minimum error and maximum rate how do u calculate it!!

GREAT, I got smthn around those values, How did ur graph go?

 

[Duamask]

GUYS, Was the last cation Sulphate or Sulphite? I got Sulphite :O Anybdy else?

 

[raiyanfarrukh]

which ions did u guys get for q2

I got
FA5 as Cu2+ and Cl-
FA6 as OH-
FA7 as Pb2+
FA8 as chromate ion
Wb u all guys what u got

 

[raiyanfarrukh]

GUYS, Was the last cation Sulphate or Sulphite? I got Sulphite :O Anybdy else?

I got sulphate because white ppt was insoluble in dilute acid!

 

[raiyanfarrukh]

GREAT, I got smthn around those values, How did ur graph go?

best fit line two points were not on the line rest were on the line volume on x-axis and rate on y-axis

 

[Soldier313]

I got
FA5 as Cu2+ and Cl-
FA6 as OH-
FA7 as Pb2+
FA8 as chromate ion
Wb u all guys what u got

Hey yea got the same!!
and i got sulphate too
alhamdulillah....

 

[raiyanfarrukh]

Hey yea got the same!!
and i got sulphate too
alhamdulillah....

Alhamdulilah i am glad someone's answers r matching with mine!!!!

 

[iKhaled]

Alhamdulilah i am glad someone's answers r matching with mine!!!!

under the table of that thingy where u have to mix the solutions to figure out whats in it, i got same things as u but i didnt write anything under chlorine? and the question is 3 marks how much will i get? :/ and what did u get when u add FA5 on FA6 which was the first test, i get blue ppt then it turns into light green

 

[raiyanfarrukh]

under the table of that thingy where u have to mix the solutions to figure out whats in it, i got same things as u but i didnt write anything under chlorine? and the question is 3 marks how much will i get? :/ and what did u get when u add FA5 on FA6 which was the first test, i get blue ppt then it turns into light green

Maybe u will lose 1 mark no i just got blue ppt insoluble in NaOH or FA6

 

[Thampi4]

I got
FA5 as Cu2+ and Cl-
FA6 as OH-
FA7 as Pb2+
FA8 as chromate ion
Wb u all guys what u got

i got tha same as fa5 fa7 and fa8 and fa6 but not sure for Cl-

 

[Thampi4]

GUYS, Was the last cation Sulphate or Sulphite? I got Sulphite :O Anybdy else?

i got a sulphate mine didn't dissolve in acid

 

[melly713]

hey wat ans for d mole concept ques u guys got for pp31?

 

[raiyanfarrukh]

hey wat ans for d mole concept ques u guys got for pp31?

last calculation part on page 3 before the table i got 5*10^-4 mol/dm^3 as my conc for I2 what was urs??

 

[nerdybookworm]

it went realli good..was very easy bas i hope i get my graph correct..:3

 

[nerdybookworm]

I got
FA5 as Cu2+ and Cl-
FA6 as OH-
FA7 as Pb2+
FA8 as chromate ion
Wb u all guys what u got

got the exact same ans as yurs..

 

[nerdybookworm]

last calculation part on page 3 before the table i got 5*10^-4 mol/dm^3 as my conc for I2 what was urs??

i effed up here..:/..gosh i hope my graph goes write..:3

 

[nerdybookworm]

i got a sulphate mine didn't dissolve in acid

i too got sulphate!!

 

[raiyanfarrukh]

i effed up here..:/..gosh i hope my graph goes write..:3

no problem u will loose 1-2 marks for that but u will get the marks for the graph and for the table including units!!!!!

 

[Soldier313]

last calculation part on page 3 before the table i got 5*10^-4 mol/dm^3 as my conc for I2 what was urs??

i got 2.5 x 10^-3mol/dm^3.......