F321 27th May 2016

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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.

Yeah probably 2/3 out of 5

Reply 181

Randall13

Original post by GEEKSruletheworld!

Yeah probably 2/3 out of 5

oh right thanks.

Reply 182

Randall13

Original post by GEEKSruletheworld!

Yeah probably 2/3 out of 5

@GEEKSruletheworld!

also for the one about the moles of nitrogen atoms could I say

1.699 times 10 to the power of -3.

(edited 7 years ago)

Reply 183

bigzman123

Original post by 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.

Nope becuase it dosnt you have to round your answer

Reply 184

Randall13

Original post by bigzman123

Nope becuase it dosnt you have to round your answer

@bigzman so this would gain both marks?
thanks.

Reply 185

CookieMonster786

Posted from TSR Mobile

Reply 186

CookieMonster786

Yeah I think it's too high....I mean tbh looking at it I probs got bang on C....meaning this resit was absolutely pointless.....I wanna cry!!! :mad:

Posted from TSR Mobile

Reply 187

Derek12353

i did HNO2 bcos it said something about there being only one product

Reply 188

dash52

If you put the electronic configuration for ga3+ would they mark you down even though I included ga3+= 1s2....
In an ideal world I hope they would just ignore that, also do you get a mark for explaning the reactivity for the two chosen test tubes as it just said state I didnt bother with that.

Reply 189

N/AAAA

Hey, does anybody know why the answer for the lowest fourth ionisation energy is Silicon (Si) rather than Argon (Ar) considering Argon has the most shielding? My logic is that Argon has more electrons than Si AND more electron shells thus, there is more repulsion meaning less nuclear attraction and so the outer electron on the 4th ionisation energy is more easily lost. Am I missing something obvious here? :P

Reply 190

Derek12353

Original post by Kralamoonard

si has 4 electrons in outer shell,
its easier to remove the last electron in the valence shell than remove the fourth electron from a shell

Reply 191

UnknownAnon

Original post by Derek12353

si has 4 electrons in outer shell,
its easier to remove the last electron in the valence shell than remove the fourth electron from a shell

Also argon has a full electron shell. Therefore it takes more energy to remove the electrons.

Reply 192

Butterflyshy

where can i find the unofficial markscheme

Reply 193

sqr00t

Some trolls messed around with the first versions I think, but there is a uneditable version too, it would be found somewhere in this thread or threads with a similar title, but heres a thread that provides an attempted unofficial markscheme
https://www.thestudentroom.co.uk/showthread.php?t=4123873

Technically F321 has functioned for its last year in the last exam season so I'm assuming you're trying to find the mark scheme for revising the new spec that was done for the first time last year. Ask your school teachers to get you them. Else if your school would not provide you with it as it would be mock exam material, you won't be getting it.

Reply 194

GEEKSruletheworld!

Many people have been asking me to repost the pictures of this paper so here it is. Please bear in mind that I did not take these pictures and so the answers written are just a rough guess and not the official mark scheme. I presume all of the AS cohort are desperately trying to hunt for this paper before a mock exam? so good luck with your revision :redface: