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Hudl
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Hello Guys Image

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 Image Feel free to share your notes and tips for this Unit


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)
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blazekid75
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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.
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Hudl
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(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
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The.Joker
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I'm resitting this exam too. I hate the inorganic stuff in this topic.
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Hudl
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(Original post by The.Joker)
I'm resitting this exam too. I hate the inorganic stuff in this topic.
Yeah your icon seems familiar. What did you get first time?
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The.Joker
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(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!!
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TheIsotope
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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?
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Hudl
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(Original post by The.Joker)
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!!
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?
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TheIsotope
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(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
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thecurlymedic48
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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?
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thespontaneous1
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(Original post by ilikebigbuttshaha)
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?
The spec is correct, it is sparingly soluble.
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Hudl
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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

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
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pandabun
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(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 hopefully, anyway!

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Danny786
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Anyone got any revision notes?
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nectempus
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Hey guys, anyone have a list of mechanisms we need to learn or a handy link to them?
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thespontaneous1
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Are Mechanisms for tertiary and secondary haloalkanes on spec?
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stephbo
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(Original post by nectempus)
Hey guys, anyone have a list of mechanisms we need to learn or a handy link to them?
- Electrophilic Addition
- Nucleophilic Substitution
- Elimination
- Formation of Haloalkanes


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nectempus
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(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.
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spanishovenfork
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Hey guys hows everyone finding chem 2?

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nectempus
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(Original post by spanishovenfork)
Hey guys hows everyone finding chem 2?

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Not great - its quite a bit harder than chem 1 haha
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