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OCR B (Salters) F332 Tuesday 4th June 2013 Exam Discussion (Now Closed)

Reply 100

cheetahs56

OP

Original post by SherlockHolmes

What did you get for the competence mark? Do teachers generally give everyone a 12 for this?

Not ours, only got 10 :mad:

. Depends what school and how the teachers are tbh. Ask and i'm sure they'll tell you :wink:

On another note anyone breaking up for study leave? And when do you go back? Our wonderful school decided to send us back before all of our exams are over (inc. F332)..... :rolleyes:

Reply 101

imym

14

Hi guys! Hope everyone's revision is going well! :smile:

I was just wondering if anyone had a copy or link to the F332 Jan 2013 paper? It might have already been posted and I missed it, apologies if so!

Thank you! :biggrin:

Reply 102

nukethemaly

11

Original post by imym

Hi guys! Hope everyone's revision is going well! :smile:

I was just wondering if anyone had a copy or link to the F332 Jan 2013 paper? It might have already been posted and I missed it, apologies if so!

Thank you! :biggrin:

Here!

2013_F332_January (1).pdf242.0KB

2013_F332_January_advance_notice.pdf234.7KB

2013_Markscheme_January_F332.pdf197.9KB

Reply 103

imym

14

Original post by nukethemaly

here!

thank you :d:d:d

Reply 104

blondie24

2

In the Chemical ideas book (pg 33) about first ionisation enthalpy why is it more difficult to remove electrons from atoms across a period (I'm aware that its because more electrons are being added and so more protons creating a more positive nuclear charge) but why is it then easier to remove electrons down a group? because the mass also gets bigger? the graph on pg 34 has totally thrown me.

HELP PLEASE :colondollar:

Reply 105

usycool1

19

Original post by blondie24

In the Chemical ideas book (pg 33) about first ionisation enthalpy why is it more difficult to remove electrons from atoms across a period (I'm aware that its because more electrons are being added and so more protons creating a more positive nuclear charge)

Yup, because number of protons increase so the attraction between the nucleus and the electrons is stronger (stronger nuclear attraction). This means more energy is required to overcome the stronger forces of attraction, hence meaning the ionisation enthalpy increases across a period.

but why is it then easier to remove electrons down a group?

The outer electron(s) get further away from the nucleus and there is more shielding from inner shells. As a result, there is less nuclear attraction for the outermost electron(s), making it easier to remove electrons.

Make sense? :smile:

Reply 106

blondie24

2

The outer electron(s) get further away from the nucleus and there is more shielding from inner shells. As a result, there is less nuclear attraction for the outermost electron(s), making it easier to remove electrons.

Make sense? :smile:

Yeah kinda, but don't the outer electrons get further away from the nucleus across a period also?

Reply 107

usycool1

19

Original post by blondie24

Yeah kinda, but don't the outer electrons get further away from the nucleus across a period also?

Nope

They actually get closer, if anything.

I'm guessing you're thinking that they get further because the atomic masses increase as you go across the period? Remember: as you go across a period, the number of electrons increase by one in the same shell. Also, the number of protons increase as you go across the period. The increasing positive nuclear charge therefore gradually increases so the electrons are attracted more and more strongly. This will pull the electrons slightly closer to the nucleus, so they don't get further away. :nah:

Make sense? :smile:

(edited 10 years ago)

Reply 108

blondie24

2

Original post by usycool1

Nope

They actually get closer, if anything.

I'm guessing you're thinking that they get further because the atomic masses increase as you go across the period? Remember: as you go across a period, the number of electrons increase by one in the same shell. Also, the number of protons increase as you go across the group. The increasing positive nuclear charge therefore gradually increases so the electrons are attracted more and more strongly. This will pull the electrons slightly closer to the nucleus, so they don't get further away. :nah:

Make sense? :smile:

OMG that makes so much more sense! thank you :colondollar:

Reply 109

writteninthestas

Hi guys, I have such issues with chemistry, I understand it but when it comes to revision the content refuses to stay in my head :frown:

Do you have any advice please, I'm dreading my unit 1 retake and my unit 2 exam.

Reply 110

super121

5

Original post by writteninthestas

Hi guys, I have such issues with chemistry, I understand it but when it comes to revision the content refuses to stay in my head :frown:

Do you have any advice please, I'm dreading my unit 1 retake and my unit 2 exam.

Just do loads of past papers, you will begin to find that the questions are quite repetitive :smile:

Reply 111

Welbeck

3

Hey guys, I remember speak to some of you from F331 in Jan. I hope you did well, I got 48/60 which is an A but for my course work I got 50 so I think that will be a B! I will have to smash this final exam now :smile:

Reply 112

cheetahs56

OP

Original post by Welbeck

Hey guys, I remember speak to some of you from F331 in Jan. I hope you did well, I got 48/60 which is an A but for my course work I got 50 so I think that will be a B! I will have to smash this final exam now :smile:

Hi! I got 47 in the coursework :frown:

50 in the exam though so just need to get an A in this exam now! Easier said than done though....

Reply 113

3raindrops

yr 13 here, 3rd time sitting this damn paper, but its the biggest unit! Got a B first time, then a C so hoping I get a high A this time coz A2 is a real struggle

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Reply 114

Branny101

Hey guys,
Could someone please help/post the reagents and conditions for the reactions we need to know because there are a few and I keep finding them scattered around both CI and the revision guide in different places :hmpf:

Thanks in advance !

Posted from TSR Mobile

(edited 10 years ago)

Reply 115

super121

5

Original post by Branny101

Hey guys,
Could someone please help/post the reagents and conditions for the reactions we need to know because there are a few and I keep finding them scattered around both CI and the revision guide in different places :hmpf:

Thanks in advance !

Posted from TSR Mobile

I've posted a list of them earlier in the thread (or it might be in the thread for the advanced notice)