Edexcel GCE AS Chemistry Unit 1: 22nd May 2015 + Unit 2: 02nd June 2015

Original post by Faaiz Shah

so far lost marks on
1-2 marks - mass spec
1-2 marks athlete question
1-2 marks electrolysis
1 mark for the isomer and 1 mark for definition
1 mark for isoelectric ion.
so about 6-8 marks overall... anybody else??

Why marks lost in electrolysis? What did you get wrong? I drew like a Unit 5 thing with salt bridge, cathode and anode with Na+ to anode and Cl- to cathode lmfao

Reply 1382

AA10743

Original post by Nautic4l

DID NOBODY GET P3- and if you think you got something different and that it is right, please explainnn

For the multiple choice question where is gave you stuff in 1s^2 2s^2 2p^6.... form, P^-3 is correct

Reply 1383

annie79

9

Original post by Faaiz Shah

Thats exactly what i thought to my self in the exam. Also you just owned that guy.

so did you guys get 7 or 3?

Reply 1384

rasil23

3

Made a pretty stupid calculation error, instead of using 56.1 as mr of CaO I decided to use my brain instead of literally turning the page, I did 40+16
so my mass of CaO was like 7.34g instead of whatever the answer was
my moles were correct though so idk, thats 2/3 right?

Reply 1385

Abi1997

Original post by MoHoosen9167

Aluminium (if it was forming a negative ion with Argon electron config) would be Al5- right?

I got that. But I dont think that ions even possible is it?

Reply 1386

Original post by rasil23

where the hell are you guys even getting Ga3+ from haha.
I put P3- i think but wouldn't S2- also be correct?

I got P3-

Original post by annie79

-heat loss
-density of HCl assumed to be the same as that of water
-specific heat capacity of apparatus (polystyrene cup) ignored

not sure if incomplete reaction will be on the list as the question said the solid was in excess..thats why i didnt put it down

Thank you!! :smile:

Reply 1387

annie79

9

Original post by Nautic4l

Why marks lost in electrolysis? What did you get wrong? I drew like a Unit 5 thing with salt bridge, cathode and anode with Na+ to anode and Cl- to cathode lmfao

LOOL sounds like you went all out bro

Reply 1388

AA10743

Original post by lfcrules

Ga is not in period 3 mate

Damn thought it said group 3

Reply 1389

Original post by AA10743

For the multiple choice question where is gave you stuff in 1s^2 2s^2 2p^6.... form, P^-3 is correct

yeah i got that too but i mean the chlorine and isoelectronic Q

Reply 1390

Faaiz Shah

Original post by Nautic4l

omg HI THANK YOU!! you seem to know your stuff... what errors for the HCl polystyrene cup thing?

it will be (0.5 x2 / the temperature change )x100

Reply 1391

Original post by annie79

LOOL sounds like you went all out bro

Lmfao :'( It just threw me!

What did you draw?

Reply 1392

MoHoosen9167

10

Original post by Faaiz Shah

Thats exactly what i thought to my self in the exam. Also you just owned that guy.

Really wasn't about "owning" anyone.

Reply 1393

Original post by Faaiz Shah

it will be (0.5 x2 / the temperature change )x100

what? WHAT IS THIS Q???

Reply 1394

Renzhi10122

11

Original post by annie79

so...what did you get Renzhi?

7.45 g

Reply 1395

rasil23

3

Original post by Nautic4l

Lmfao :'( It just threw me!

What did you draw?

Bruh I drew a salt bridge in there too just for fun haha, **** that question

Reply 1396

Faaiz Shah

Original post by annie79

so did you guys get 7 or 3?

i got 7.45g

Reply 1397

Faaiz Shah

Original post by Nautic4l

what? WHAT IS THIS Q???

its not... the enthalpy question said that the thermometer measured in 0.5 graduation... i was showing how calculate error....RELLAAAAAAAAAAAAX

Reply 1398

MoHoosen9167

10

Original post by Nautic4l

Lmfao :'( It just threw me!

What did you draw?

I DID THE SAME THING OMG then I was like "why would you have a separate solution of positive and negative ions?" and then killed my eraser and drew it properly haha

Reply 1399