How was Chemistry P34?

[Nightmare***]

nope

 

[Nightmare***]

what is the expected GT ??? huh?

 

[shafayat]

was there any reaction between fB6 and fB7?

I think there was white ppt and soluble ! though I wrote no reaction

 

[Nightmare***]

but i did this reaction like 3 times....i got no reaction

 

[shafayat]

btw what were the concentrations of NaOH! ??
in first question I found it as 1.77 I guess ! and the second question I fount 0.166 mol/dm3

 

[shafayat]

but i did this reaction like 3 times....i got no reaction

neither did I ! .. I did twice

 

[Nightmare***]

r u sure it was supposed to give a white soluble ppt???
and do u hv any idea abt the expected GT?

 

[Nightmare***]

btw what were the concentrations of NaOH! ??
in first question I found it as 1.77 I guess ! and the second question I fount 0.166 mol/dm3

for first i got 1.8 smthing....but i dnt remembr the 2nd one

 

[Hassam Afzal]

btw what were the concentrations of NaOH! ??
in first question I found it as 1.77 I guess ! and the second question I fount 0.166 mol/dm3

in Q1 my concentration was 1.95 and in Q2 it was 1.92.

 

[shafayat]

r u sure it was supposed to give a white soluble ppt???
and do u hv any idea abt the expected GT?

Ohh dude my bad I am sooo sorry ! the reaction I am talking bout is fb5 and fb7 sorry man ! the other one was no reaction !!!
I was soo happy after the exam I even forgot to ask him about the GT

 

[shafayat]

in Q1 my concentration was 1.95 and in Q2 it was 1.92.

how can the second one be 1.92?
what I did was ! (moles/((30-whatever I got from graph)/1000))
what did u do ?

 

[Hassam Afzal]

Can anyone tell me about the answer to the last part where they asked about the identification of some organic compounds.

 

[Hassam Afzal]

how can the second one be 1.92?
what I did was ! (moles/((30-whatever I got from graph)/1000))
what did u do ?

the solution for which you were to find the concentration in both questions was the same so its concentration was supposed to be the same too.

 

[Nightmare***]

Ohh dude my bad I am sooo sorry ! the reaction I am talking bout is fb5 and fb7 sorry man ! the other one was no reaction !!!
I was soo happy after the exam I even forgot to ask him about the GT

Now that is a big relief.... ...lol

 

[shafayat]

the solution for which you were to find the concentration in both questions was the same so its concentration was supposed to be the same too.

dude exactly what I thought ! but the calculations never got me there ! :/

 

[shafayat]

Can anyone tell me about the answer to the last part where they asked about the identification of some organic compounds.

I did 2,4-DNPH and Na(metal) !!

 

[Nightmare***]

in Q1 my concentration was 1.95 and in Q2 it was 1.92.

what was ur titration reading.....though it varies frm center to center

 

[Nightmare***]

I did 2,4-DNPH and Na(metal) !!

but wouldnt both ethanol and ethanoic acid react with Na metal ???

 

[shafayat]

20.95 maybe

what was ur titration reading.....though it varies frm center to center

what did you get?

 

[shafayat]

but wouldnt both ethanol and ethanoic acid react with Na metal ???

exactly ! but 2,4-DNPH only react with ethanoic acid and aldehyde! so if both reactions occur then its ethanoic acid other wise its ethanol if only Na works
if only DNPH then its aldehyde