how was chemistry paper 22

[sandrawrr]

no

ah shoot there goes a mark.. :'( .. Do you remember the oxidation number question?

 

[A star]

ah shoot there goes a mark.. :'( .. Do you remember the oxidation number question?

yes i think +5 and -3 was the answer

 

[thp2011]

In the last question what was the molecular formula for the ester?? I got 3 O in the molecular formula. :'( n I got. 65% purity in the yield question. n wrote nh3 + H+ ---> nh4+ how many marks will I loose can I still get a B..I just want to die

 

[sandrawrr]

yes i think +5 and -3 was the answer

ah damn. I wrote +3.... so many silly mistakes it really frustrates me.

 

[A star]

In the last question what was the molecular formula for the ester?? I got 3 O in the molecular formula. :'( n I got. 65% purity in the yield question. n wrote nh3 + H+ ---> nh4+ how many marks will I loose can I still get a B..I just want to die

well youwill lose i guess 4 marks in the last question . one mark in the NH3 if explaination there and 2 in purity i guess. i am not sure cause paper was easy so marking can be harsh

 

[A star]

ha

ah damn. I wrote +3.... so many silly mistakes it really frustrates me.

ppened with me in phy dw ddo well in prcctcls and p1

 

[sandrawrr]

ha
ppened with me in phy dw ddo well in prcctcls and p1

Good luck to you! ace it!

 

[sandrawrr]

The molecular formula for the ester was the empirical formula x2 right?

 

[A star]

Good luck to you! ace it!

same to you

 

[mastermindh]

Which one forms pi bond ??
and what was eq for weak base ?

 

[FRENZYAMU]

hey

In the last question what was the molecular formula for the ester?? I got 3 O in the molecular formula. :'( n I got. 65% purity in the yield question. n wrote nh3 + H+ ---> nh4+ how many marks will I loose can I still get a B..I just want to die

buck up, dnt be like tht

 

[FRENZYAMU]

Which one forms pi bond ??
and what was eq for weak base ?

I wrote Oxygen had pi bonding
nd eq was
NH3 + H2o = (NH4)+ + OH-

 

[FRENZYAMU]

The molecular formula for the ester was the empirical formula x2 right?

yup

 

[Jinkglex]

Guys the chiral question can go either way depending on your own individual structure! dont lose hope!

Secondly, I believe there were multiple pi bond makers, including N, O, perhaps even C.

 

[s_hithappens]

perhaps even C

?? c is correct though right?

 

[sandrawrr]

Mg is the one which sinks right?

 

[FRENZYAMU]

Mg is the one which sinks right?

i wrote K sinked

 

[s_hithappens]

it has to be something from the bottom of group 1, so it sinks and reacts with water

 

[4hsan786]

I also wrote calcium.

 

[beeloooo]

K floats on water , doesn't sink ! and C i dont think it actually does form a pi bond :/ isnt it single bonded ?