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OCR Chemistry Salters B F331 27th May 2016 (Old specification)

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i don't think it asked for shape anyways?
Reply 81


Me !
Reply 82


well i lost marks on the calculations ones so Im gonna try extra hard for f332 its the bigger unit :biggrin:
Reply 83
Original post by meg16
Shape is tethradehral for 4 areas no lone pairs and I put same for thermal stability also for the zeolite of F was branches and the other one was straight I thought ?


I put that, I thought F was branched and G was straight??


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Me!!!!!!
Reply 85
I got +41 for Hess's law
Reply 86
I'm doing f332 tooo
Energy density 36200 or something and 41 for the enthalpy change right? Anyone?

And 0.23 for the first calc question?
Reply 88
Original post by samhorton11
i don't think it asked for shape anyways?


nope but u had to draw the 3d structure for 1 mark with dotted line and wedges
Original post by Kwaks
I put that, I thought F was branched and G was straight??


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I think I just wrote that G was slightly longer. What you wrote makes sense actually
Reply 90
Original post by sam2222
well i lost marks on the calculations ones so Im gonna try extra hard for f332 its the bigger unit :biggrin:


Yeah me too, I still haven't read the prerelease yet. I need to do that ASAP


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Were the oxygen atoms charged?
(edited 7 years ago)
Reply 92
Original post by Kwaks
I put that, I thought F was branched and G was straight??


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oh crap, I didn't even mention f or g I just said it has pores acts molecular sieve, traps branched and lets straight chain through...
Original post by SohaXO
Can you just scrape out you troll, you created your account just to troll like that is beyond sad.... Get a life plzzzzzz fankkkzzzzzzzz


sym kmt


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Reply 94
Original post by Kira Yagami
Energy density 36200 or something and 41 for the enthalpy change right? Anyone?

And 0.23 for the first calc question?


Yep I got that apart from your first calculation.


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Reply 95
Original post by Kwaks
Yeah me too, I still haven't read the prerelease yet. I need to do that ASAP


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https://www.youtube.com/watch?v=l5CR8k4uFtg he works through the whole thing!
Reply 96
Original post by sam2222
oh crap, I didn't even mention f or g I just said it has pores acts molecular sieve, traps branched and lets straight chain through...


You probably didn't have to mention it, I just did just in case.


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Reply 97
Original post by sam2222
https://www.youtube.com/watch?v=l5CR8k4uFtg he works through the whole thing!


Ooooooooo thank you :smile:


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Reply 98
Original post by Kira Yagami
For the first calculation did you put 0.23?

what did you guys put for mass one?

For energy density was it something 36200

41 for the enthalpy reaction thing?


I got 0.23 but I don't reckon thats right, I got like 0.6 for mass I think
Original post by Kwaks
Yep I got that apart from your first calculation.


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Pretty sure I got the first 2 1 mark calc wrong.

0.23 and like 0.059 something grams..

Did you put 0.74 for the mole % of Kno3 ?

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