Ocr f321 23 may 2013~official discussion thread

Definitely better than biology, thought it was good, but I guess we'll see on results day.

I might be able to get a copy of the paper but tomorrow morning :/

Anyone else get ClO- as the ion in the bleach question, conc aq ammonia as the thing to distinguise between Br- and I-?

Plus, the drawing, I put the dative covalent in the BF3 bit, between a fluorine and the boron, and has a double bond between the nitrogen and the boron? Not sure if this is right, but it seemed to work out alright

I might be able to get a copy of the paper but tomorrow morning :/

Anyone else get ClO- as the ion in the bleach question, conc aq ammonia as the thing to distinguise between Br- and I-?

Plus, the drawing, I put the dative covalent in the BF3 bit, between a fluorine and the boron, and has a double bond between the nitrogen and the boron? Not sure if this is right, but it seemed to work out alright

omg please will you post a copy on here please please please

Yeah it is ClO-, and conc. ammonia.

But it's your drawing is incorrect, it's the dative covalent bond between the nitrogen and boron. All the fluorines and hydrogens are bonded singly.

What's done is done.I didn't do a resit for bio because ill do it next year but yeah however if you didn't read the question carefully,you'd be screwed on today's exam


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finally been able to upload the paper...so here it is people! Enjoy!

It's cause of "dem people" complaining about A-levels getting easier...

yes thank you!!!!!!!!!!!!!!

Continued...

I thought it just had that idiotic verbose part question passage...

I thought the question subsequently followed in the following way: "The student then.... They noticed that...."
Am I wrong!?

Even so, I feel Cyclohexane is for when distinguishing displacement reactions; not necessarily precipitation formation react ions high was clearly stated.

I hope that it is right!
It was only natural! It didn't take long to think of!
If I write something down too fast, it means it definitely is natural!





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The dative covalent bond is between the Boron and Nitrogen.

NH3 is three bonded pairs (N-H) and a lone pair of electrons. The Lone pair then acts as the dative covalent bond with Boron which is also has three bonded pairs (B-F).

Thats what i did and seemed to work.

One can't deny a levels are getting easier though


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You're a life saver! Thanks so much man!


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Awh thanks, I just re-drew it and yeah it makes sense now.. the beauty of hindsight and all :P