Chemistry Unit 6B 15.05.2013!! June 2013

[Aaron Rodrgp]

I thought the paper was the hardest yet!! What did u guys think??

 

[Adam94]

It was really difficult. None of the people in our centre said it was easy...

 

[Aaron Rodrgp]

i guess the paper style was different yeah? The nmr questions stuffed me up!
what did you get for the activation energy? and the colour of a nickel complex in excess ammonia can be written as violet right?

 

[Adam94]

i guess the paper style was different yeah? The nmr questions stuffed me up!
what did you get for the activation energy? and the colour of a nickel complex in excess ammonia can be written as violet right?

Hahaha the nmr was the worst. For the activation energy i got +8.23 x 10-3 J mol-1 K-1 , 10-3 or 10-4 i can't remember but something like that , and the nickle complex in excess ammonia forms blue solution

 

[Aaron Rodrgp]

darn...ive learnt it as lavender blue or violet

 

[Adam94]

what were the orders supposed to be ? So many had different answers, some of us got half orders. I got 1/2 order for glucose and sulphuric acid and for Kmno4 as 1st order

 

[Nofel Mehmood]

The activation energy was not that low. :O coz the gradient was really high.

 

[Aaron Rodrgp]

yeah i got 83100Jmol-1

 

[Remus1982]

This was the worst paper ever! I got gradient as 0.118 something.....

 

[Adam94]

The activation energy was not that low. :O coz the gradient was really high.

I might have made a mistake then when i calculated the gradient :| ... Wow more mistakes are showing up -.-

 

[Aaron Rodrgp]

i got the gradient as -10 000 :/

 

[Nofel Mehmood]

i got the gradient as -10 000 :/

Thats what i got too. The final answer becomes positive.

 

[Unique_39]

It was lonnnggg! I was writing till the last second -_-

 

[Aaron Rodrgp]

Glucose was 0 order, the other two were first order
can someone tell me abt the nmr question? what were your answers?
oh and also the answers to the final question

 

[Aaron Rodrgp]

Thats what i got too. The final answer becomes positive.

yeah, 83100Jmol-1

 

[Aaron Rodrgp]

It was lonnnggg! I was writing till the last second -_-

i had like 20 mins left at the end

 

[qstar.inc]

I FAILED!!!

This was the worst paper ever! I got gradient as 0.118 something.....

my gradient was -10000

yeah, 83100Jmol-1

i wrote it as 8.31 x 10^4 . will that show up a problem?

 

[Nofel Mehmood]

yeah, 83100Jmol-1

I got as 83500..

 

[Ni7san]

It was lonnnggg! I was writing till the last second -_-

And i was writing till the last millisecond .plz can some1 tell how many marks were alloted for 2nd question and what was yellow solution in the nickel question.I could only write upto recrystal for the last question what do u think will i get the mark

 

[Adam94]

For the nickel question I think it was [NiCL4]2- . For the very last question it is recrystillisation