AS OCR chemistry B (SALTERS) F331 on the 15th may 2012

am just doing some old questions and drawing an enthalpy diagram has come up as a question, is this no longer in F331 because this is a resit and I haven't revised F332!!

Reply 41

dongonaeatu

Original post by amber109

got half an hour left to revise, what should do?....

revise

Reply 42

sunny_veggies

2

Original post by bertiejess

am just doing some old questions and drawing an enthalpy diagram has come up as a question, is this no longer in F331 because this is a resit and I haven't revised F332!!

What?

Reply 43

randomfatguy

Does this exam start at 1:30? please say yes

Reply 44

dirrane

OP

Can someone explain to me what i need to know for periodicity and group 2 trends?

Reply 45

dirrane

OP

Original post by randomfatguy

Does this exam start at 1:30? please say yes

yeah it does :biggrin:

Reply 46

Salmonidae

1

Original post by dirrane

Can someone explain to me what i need to know for periodicity and group 2 trends?

Read posts # 10 and 11 here

Reply 47

randomfatguy

Original post by dirrane

yeah it does :biggrin:

Praise jesus...however i am doing sciences for A levels so i suppose i will thank the lord instead...oh wait...i'll thank the examinations board :smile:

Reply 48

dirrane

OP

Original post by xxZazxx

basically just the lime water going cloudy in the presence of CO2, so u know, heat the metal in a test tube over a bunsen burner, collect the gas given off in a gas syringe and feed the other end of the syringe into a test tube of lime water. refer to controls like same amount of metal, same volume of limewater, repeats etc. the longer it takes for the lime water to go cloudy the more thermally stable the metal, thermal stability increases down the group. that should be enough to get you the full marks

Thank you, you just saved my life :wink:

Reply 49

vicky8761

my teacher gave us like a list of polar bonds and ones that form permanent dipole- permanent dipole bonds, but i cant find the sheet. can anyone tell me what bonds they are?
i know halogen- pretty much anything
c-o
any others?

Reply 50

sunny_veggies

2

Original post by randomfatguy

Does this exam start at 1:30? please say yes

Yes

Reply 51

bertiejess

Original post by dirrane

Can someone explain to me what i need to know for periodicity and group 2 trends?

Group 2 trends -

Carbonate solubility decreases down group
Hydroxide solubility increases down group
Thermal stability of carbonates increases down group

Periodicity - melting point increases and then after Group 4 decreases

This trend is repeated through the periods

Hope this helps a bit :smile:

(edited 11 years ago)

Reply 52

randomfatguy

Does anyone know what topics from F331 came up in Jan exam?
If so could someone make a short list of them, this would narrow down what they could put in our exam today. I think it would help :smile:

Reply 53

ManPowa

7

Original post by vicky8761

my teacher gave us like a list of polar bonds and ones that form permanent dipole- permanent dipole bonds, but i cant find the sheet. can anyone tell me what bonds they are?
i know halogen- pretty much anything
c-o
any others?

I think youre in the wrong thread. This is for OCR SALters.. I think you do Chem A which is F321 and this is F331

Reply 54

ManPowa

7

Original post by randomfatguy

Does anyone know what topics from F331 came up in Jan exam?
If so could someone make a short list of them, this would narrow down what they could put in our exam today. I think it would help :smile:

With chem, you really cannot predict anything at all. You just have to learn and practisr the spec compared to something like bio, where you can actuallly predicts what might come up.

Godd luck today :smile:

Reply 55

vicky8761

Original post by ManPowa

I think youre in the wrong thread. This is for OCR SALters.. I think you do Chem A which is F321 and this is F331

no i definitely do salters and im sitting f331

Reply 56

Salmonidae

1

Original post by vicky8761

my teacher gave us like a list of polar bonds and ones that form permanent dipole- permanent dipole bonds, but i cant find the sheet. can anyone tell me what bonds they are?
i know halogen- pretty much anything
c-o
any others?

Yes that stuff is in either F332 or you're on the wrong thread for your exam sylabus, will not find anything on that in F331 :smile:

Reply 57

dirrane

OP

Original post by bertiejess

Group 2 trends -

Carbonate solubility decreases down group
Hydroxide solubility increases down group
Thermal stability of carbonates increases down group

Periodicity - melting point increases and then after Group 4 decreases

This trend is repeated through the periods

Hope this helps a bit :smile:

That was Beautifully put together mate :smile:

Reply 58

ManPowa

7

Original post by vicky8761

no i definitely do salters and im sitting f331

Okay, but whatever you said about bonding is not in the F331 spec.