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OCR Chemistry F322~ 4th June 2013~ AS Chemistry

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Reply 3320

Danielleborman

Would I get away with just putting 'anaerobic (no oxygen)' for the conditions or did you need to put yeast too?

Reply 3321

BeckiFlute(:

Original post by Lysipud

Hmm I said because CO2 gas is being produced. Reacon I'll get a mark for that?

Since when was CO2 not a colourless gas but CO was..?! If it had completely combusted, there would have been no smoke. I'm pretty sure it was due to unoxidised reactants being released as gas?

Reply 3322

sohailkm96

I thought it was quite easy, only one question I didn't get at all and it was a 1 marker:

State a biodegradable CFC (or something along those lines): I put Fluorinated hydrocarbons (cause the C-F bond can't break in UV light) but I'm really not sure? Anyone know?

Reply 3323

username1107833

Original post by Pataiiii

Calm down mate, its ok if your poor at chemistry but there's no point venting out your anger on others.

Jesus christ, you obviously don't know sarcasm when you see it haahahah

Reply 3324

bluedate

Original post by motivatedshroom

You guys are definitely right with the 820. I remember thinking about it and them not doing anything about it sadly in the exam!

Posted from TSR Mobile

In my working out I got 820, but I think i put a wrong number on the answer line, will i lose the marks??

Reply 3325

reneetaylor

Original post by Onkar-M

I was thinking breathalysers but I put measuring pollutants in the atmosphere because I saw that on a mark scheme too.
Seems like I made careless mistakes like s4 not s4+. Hope it's around 76-77 for an A!

For the s4 bit, that should be alright, when they ask for molecular ion values in terms of 23 m/z or 15 m/z, they do not penalise the + sign, look through some mark schemes to put you at ease :smile:

Reply 3326

ellie2996

Is there an unofficial mark scheme yet :smile:

Reply 3327

niceguy95

Original post by dawg

C4H9OH or C4H10O I think

They won't accept c4h9oh because that's the general formula method

It's been in quite a few papers

Reply 3328

rollinglikerob

Original post by yodawg321

My face when I saw the 7 marker Boltzman Distrubtion at the end :

Reply 3329

bluedate

Original post by Loiks94

hmm I got c6h10o

same

Reply 3330

Gotzz

Original post by tamil4

is there a range for temps for the fermentation process? i put 30 :s-smilie:

also will they allow breath analyser instead of breathylyser? i was so certain breathalyser was not a word :frown:

Original post by joe1545

Same i put 35 :frown:

my brain was saying 37 but my gut was saying 35, and i put breathilyser, but i most likely spelt it wrong. I think they allow phonetic mis spelling so breathiliser would be accepted, 'Breather' would not just as an example

I'm pretty certain the temperature range is 25-37

Reply 3331

joe1545

Original post by Kat12395

Urk, if I spelled breathalysers wrong will I get the mark?:L

Posted from TSR Mobile

Yea you should do, their only picky on spellings if its chemistry related such as mispelling ethanol as etha, i probably spelt it wrong as well, not the easiest of words to spell

Reply 3332

RebelV005

Can somebody add a voting chart.
I m crying here and want to see how others did

Reply 3333

bliam

Did anyone else notice that this time the questions were actually somewhat "helpful" with what you should write as the answers? I feel as though the longer answers had a lot of guidance

Reply 3334

username1107833

It really irritates me when people just randomly pop up just to ask if the paper of unofficial markscheme is up, just expect others to do it and cannot even be asked to read the answers everyone talked about before. *rage*