F321 27th May 2016

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Definitely - they spell it 'dumb-bell' in the textbook!

As that was one mark for both correct answers, i dont think they would penalize on spelling. In the disproportionation question, they stated that it needs to be the correct spelling but in that question it didnt

Reply 161

A_Levels

Original post by tammymxx

that's what i wrote.. let me know if its acceptable to write that if u find out..

will do

Reply 162

brownjaminben

On that mark scheme posted earlier, in the last question the Phosphorus is shown as having its electrons arranged like xx xx xo oo (if that makes any sort of sense). I always thought that you had to put an electron on each corner of the circle before you could pair them so I got them arranged like xx xo xo xo

Reply 163

GEEKSruletheworld!

I wrote Sulfur Hexafluoride and then crossed it out and wrote Sulfur Hexafluorine :frown:

Reply 164

GEEKSruletheworld!

I think that paper was so cheeky of OCR, considering that we are mostly A2 students :colonhash:

Reply 165

lanner45

Original post by GEEKSruletheworld!

I wrote Sulfur Hexafluoride and then crossed it out and wrote Sulfur Hexafluorine :frown:

I did exactly the same!

Reply 166

hicham001

Original post by bigzman123

Cl2 wasnt provided, only Cl- ions were given so the Cl2 +Br- reationcoudnt take place

i was talking about the chlorine and iodine reaction that nott necessary

Reply 167

tammymxx

Original post by Abibi

My tutor said
Na
Si or P
F

flourine?? i don't think so

Reply 168

hicham001

only two reactions where needed. bromine water + cl- ions to show chlorine is more reactive (no reaction takes place) Orange
bromine water + I- ions to show bromine is more reactive than iodine (purple)
therefore Cl>Br>I in reactivity

the ionic equation which has been posted is right

only two reaction needed remember it wanted the minimum amount of reactions
Really hated this test by the way made so many silly mistakes and paper was a little cheeky, well it is OCR

(edited 7 years ago)

Reply 169

GEEKSruletheworld!

Original post by lanner45

I did exactly the same!

Great minds eh... :redface:

Reply 170

hicham001

Original post by tammymxx

flourine?? i don't think so

its Neon, because it don't form bonds extremely low boiling and its si (larger atomic radius)

(edited 7 years ago)

Reply 171

CookieMonster786

Original post by UnknownAnon

Was the reaction disproportionation?

Posted from TSR Mobile

Put disproportionation first...then crossed it out and put disproportion :mad:

Posted from TSR Mobile

Reply 172

AndrewC19

Original post by tammymxx

flourine?? i don't think so

I got Na, Si, Ne

Reply 173

Randall13

Would I lose marks?

If I said that the mol of Nitrogen atoms

as 1.699 times 10 to the power of negative -3.

Reply 174

CookieMonster786

Original post by GEEKSruletheworld!

Here you go... :smile:

I made such stupid mistakes....urghhh

Posted from TSR Mobile

Reply 175

GEEKSruletheworld!

Original post by CookieMonster786

I made such stupid mistakes....urghhh

Posted from TSR Mobile

Didn't we all :o:

(

Reply 176

Randall13

Also. @kingaaran @GEEKSruletheworld!

For the 5 marker.

I said you would use a minimum of 3 test tubes which is wrong.

I then said you would add Br2 to 2I- to form 2Br- and I2 thus would become a violet colour.

I then said you add 2CL- to the Br2(aq) so that you are just left with your orange solution.

I then said you would add 2CL- to I2(aq) to form a brown solution which is incorrect.

How many marks out of 5 would I obtain?

I'm thinking 2/3.

Reply 177

crashMATHS

Original post by Randall13

Sorry I don't do chemistry... Not gonna be much help I'm afraid :tongue:

Reply 178

ToLiveInADream

Okay, I reckon 45-46 for an A, small things catch you out. I was so happy at seeing SF6 I immediately wrote octahedral without reading the question LOOOL.