Chemistry pp ( 31) grade thresholds ..

[Majed Kaaki]

hey everyone,
i think pp 31 was sooo .... i meant ( extremely ) EASY !
i finished it in only 1 hour el7amdelah !
i think the threshold will be from 30 - 34

we need to concentrate on pp 2 now guyz ! hope we all do gr8

 

[plainious]

Touche'!

 

[Majed Kaaki]

yup

 

[rideronthestorm]

32-33 ... not more not less dan dat

 

[iKhaled]

Can we discuss the paper?

 

[Majed Kaaki]

i guess we can now ! 24 hrs gone

how did the graph looksed like ?

 

[Duamask]

i guess we can now ! 24 hrs gone

how did the graph looksed like ?

IT was a straight line innit?

 

[Duamask]

It was good, Alhamdulillah! Hope the gt is good as well

 

[Duamask]

Like no bdy on this planet gave p31 ?
24 hours passed yet or not?

 

[Majed Kaaki]

IT was a straight line innit?

i got 2 points on the straight line and 2 points just sooo away from the straight line ! im sure all my work is right cuz i revwied my answers alot !
:/ maybe 1 marks is gone from there

 

[plainious]

umm...what was your concentration for iodine?

 

[Majed Kaaki]

i got 0.0005 moles
i even did it with the concentration that they gave it to us ! i got the same points

 

[Sanis]

i got a straight line,, bas 1 point was away (not related 2 the others) & hi majoodi

 

[Soldier313]

umm...what was your concentration for iodine?

um...i got 2.5 x 10^-3 mol/dm^3 for conc of iodine.....wat abt the rest of you?

 

[Carty]

i got 0.125 mol dm of iodine..

 

[Carty]

i got 0.0005 moles
i even did it with the concentration that they gave it to us ! i got the same points

the iodine was in a 2:1 ratio with the S2O8.. plus i swore we were supposed to put the moles in the 40 cm3

 

[MindStealth]

I got the graph as a straight line, all points were close to it and it passed through the origin. Concentration of iodine was 0.0005. The time in the last part (g) was 73s.

For salt analysis:
FA5 was Copper(II)Chloride
FA6 was NaOH
FA7 was Lead ion
FA8 was Chromate ion
FA9 was Sulfate ion (SO4)

 

[Majed Kaaki]

the iodine was in a 2:1 ratio with the S2O8.. plus i swore we were supposed to put the moles in the 40 cm3

i putted in the 50 cm not 40 !!! dont depress me O_O

 

[Jaf]

i putted in the 50 cm not 40 !!! dont depress me O_O

That's what I did too. The question specifically mentioned 'the whole volume'. *high five*

 

[Carty]

i putted in the 50 cm not 40 !!! dont depress me O_O

damn.. i see where i messed up... i put it in 20 cm3 (thought it was the overall volume).. forgetting the volume of the other reagents.... hw da fuq did i do that :S..