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AQA Chemistry Unit 2 (CHEM2) 3rd June 2014

Hello Guys

Im suprised noone has made this thread already so I decided to make it in order to allow people to discuss anything they are finding difficult as I know some people are already starting to struggle with Unit 2

Feel free to share your notes and tips for this Unit :colondollar:

REVISION WEBSITES:

http://www.chemguide.co.uk
http://alevelchem.com/index.php
http://www.a-levelchemistry.co.uk/AQ...try home.htm

PAST PAPERS & MARK SCHEMES:

http://web.aqa.org.uk/qual/gce/scien...-materials.php
(January 2009-June 2011 Past Papers+Mark schemes)

http://www.xtremepapers.com/papers/AQA/Chemistry/
(2002-2008 Past Papers+Mark schemes)

http://freeexampapers.com/#A Level/Chemistry/AQA
(Jan/June 2002 - 2011 Paper & Mark scheme)

SYLLABUS:

http://store.aqa.org.uk/qual/gce/pdf/AQA-2420-W-SP.PDF

Date of the exam : 3rd June 2014 (PM)

Scroll to see replies

Reply 1

blazekid75

Retaking this in june, got a B in it last year. Everyone doing chemistry in my year are retaking this exam except for about 2 people!
Haven't started revision for it yet though.

Reply 2

Hudl

Original post by blazekid75

Retaking this in june, got a B in it last year. Everyone doing chemistry in my year are retaking this exam except for about 2 people!
Haven't started revision for it yet though.

Good, wouldnt mind the competition :smile:

Reply 3

The.Joker

I'm resitting this exam too. I hate the inorganic stuff in this topic. :frown:

Reply 4

Hudl

Original post by The.Joker

I'm resitting this exam too. I hate the inorganic stuff in this topic. :frown:

Yeah your icon seems familiar. What did you get first time?

Reply 5

The.Joker

Original post by AhmedDavid

Yeah your icon seems familiar. What did you get first time?

D :/

I started revision in the easter holidays and that was too late, so all I had time to do was cram and I barely did any past papers.

Don't make the same mistakes I did and start going over all the topics you covered from Sept!!

Reply 6

TheIsotope

Hi, im retaking this, got a B in chem1 and C in chem2, aiming for a B overall, what will I need in chem4/5?

Reply 7

Hudl

Original post by The.Joker

Yeah hopefully I wouldnt....

I need to learn how to recap Unit 1 whilst still studying Unit 2 if not I dont think Ill have the capacity to do the high grade questions when it comes to the exam.

Original post by TheIsotope

Hi, im retaking this, got a B in chem1 and C in chem2, aiming for a B overall, what will I need in chem4/5?

Nice...well to give you exact figures we'll need to know exactly what you achieved for Unit 1 & 2 UMS wise. However from reading this I say if you get 2Bs in chem4 &5 you're looking good for a B as long as you dont screw up your EMPA?

Reply 8

TheIsotope

Original post by AhmedDavid

Yeah hopefully I wouldnt....

I need to learn how to recap Unit 1 whilst still studying Unit 2 if not I dont think Ill have the capacity to do the high grade questions when it comes to the exam.

Nice...well to give you exact figures we'll need to know exactly what you achieved for Unit 1 & 2 UMS wise. However from reading this I say if you get 2Bs in chem4 &5 you're looking good for a B as long as you dont screw up your EMPA?

ok then, so i should be aiming for b's. thanks :smile:

Reply 9

thecurlymedic48

I think everyone doing A2 chemistry is retaking this exam lool
btw in the spec, it says "know that Mg(OH)2 is sparingly soluble" but all the revision material are saying that magnesium hydroxide is insoluble in water and that calcium/strontium hydroxide are sparingly soluble?

Reply 10

thespontaneous1

Original post by ilikebigbuttshaha

The spec is correct, it is sparingly soluble.

Reply 11

Hudl

I need help with redox, Ive been alright with it until I saw this question.

On the Nelson thornes book, Q2 on page 163 it says:

2) Use oxidation states to balance the following equations

a) Cl2 + NaOH -----> NaClO3 + NaCl + H2O

My teacher said that we should separate it into 2 half equations so this is what I had in mind being that only the chlorine changes oxidation number :s-smilie:

2e- + Cl2 ------> 2NaCl (x6)

6H2O + Cl2 ----> 2NaClO3 + 12H+ + 12e-

-----------------------------------------------------------------------------

2e- + Cl2 -----> 2Cl(-1) (x5)
Cl2 -----> 2Cl(+5) + 10e-

---------------------------------------------------------------------------

The second one I have tried to form the half equation using the charges of the chlorine in the different compounds. Im so confused......

I was able to do it a few weeks ago, with different equations but I dont think Ive seen one like this as this was in the book and the books method seems different from my teachers.

All help appreciated thanks x

Reply 12

pandabun

Original post by blazekid75

Retaking this in june, got a B in it last year. Everyone doing chemistry in my year are retaking this exam except for about 2 people!
Haven't started revision for it yet though.

Same! I feel like it might be a little more straight forward this time round though, seeing as CHEM4 has similar topics :biggrin:

hopefully, anyway!

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Reply 13

Danny786

Anyone got any revision notes?

Reply 14

nectempus

Hey guys, anyone have a list of mechanisms we need to learn or a handy link to them? :smile:

Reply 15

thespontaneous1

Are Mechanisms for tertiary and secondary haloalkanes on spec?

Reply 16

stephbo

Original post by nectempus

Hey guys, anyone have a list of mechanisms we need to learn or a handy link to them? :smile:

- Electrophilic Addition
- Nucleophilic Substitution
- Elimination
- Formation of Haloalkanes

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Reply 17

nectempus

Original post by stephbo

- Electrophilic Addition
- Nucleophilic Substitution
- Elimination
- Formation of Haloalkanes

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Thanks, I have just finished making some nice posters on them - think I have them nailed now, actually more of an interesting topic than I first thought in class.