CHEM UNIT 2!

[saba1996]

How can i study green chemistry? I find section C the hardest... any tips?

 

[aniekan]

Just read the book.

 

[IGCSE Abdullah]

Just read the book.

hello people need chem unit 2 note$ please!!!

 

[saba1996]

hello people need chem unit 2 note$ please!!!

There you go!

 

[saba1996]

more notes!
http://www.scribd.com/doc/88272058/As-Chemistry-Unit-2-Notes

 

[aligatorviper]

can anyone plz posts all da diagrams and apparatus for all da reactions in unit 2.

 

[aligatorviper]

th

There you go!

thankssssss aloooooooot!!!!!!!!!!!!!!!!

 

[A-level student]

can some plz solve Q21 b(i) Jan 2013 - chemistry
I just want the first bit ( the equation between KI with NaClO and HCL )
Thank u

 

[shiznini]

Jan 2012 Question 20) Last part: How to calculate volume in original disinfectant?

 

[aligatorviper]

Jan 2012 Question 20) Last part: How to calculate volume in original disinfectant?

multiply no. of mols of cl2 calculated in part3 by 25 to get da total no. of mols in the 250cm3 diluted solution. this no. is equal to the no. of mols in 10cm3 ( the original vol. of disinfectant). concentration of the original disinfectant in mols/dm3= mols*1000/10.....
hope u got it... if not den dont hesitate to ask.

 

[aligatorviper]

can some plz solve Q21 b(i) Jan 2013 - chemistry
I just want the first bit ( the equation between KI with NaClO and HCL )
Thank u

its a simple hit and trial method... balance the L.h.S wrt da R.H.S and simply add e. in the reduction equation and subtract in the oxidation reaction.

 

[shiznini]

multiply no. of mols of cl2 calculated in part3 by 25 to get da total no. of mols in the 250cm3 diluted solution. this no. is equal to the no. of mols in 10cm3 ( the original vol. of disinfectant). concentration of the original disinfectant in mols/dm3= mols*1000/10.....
hope u got it... if not den dont hesitate to ask.

Thnx

 

[A-level student]

its a simple hit and trial method... balance the L.h.S wrt da R.H.S and simply add e. in the reduction equation and subtract in the oxidation reaction.

So u dont need to write up the whole equation and then write each compound into its ions and cancel the spectator ions ??
If it is what u wrote ,then its pretty simple Thank You

 

[aligatorviper]

So u dont need to write up the whole equation and then write each compound into its ions and cancel the spectator ions ??
If it is what u wrote ,then its pretty simple Thank You

yup dude..... these vr separate ionic eq.s thats y u just use hit n trial method...when u have to combine them into one eq. den u have to balance the electons in both the eq.s which will obviously cancel ot n u will get ur main redox eq.

 

[aligatorviper]

today my chem. over although still unprepared....2morow ill strt bio...so plz add me in threads fr bio.. btw who is going to appear in bio as well

 

[kunal mike]

There you go!

can you also give physics unit 2 pls..

 

[deathvalley69]

anyone got the student unit guide for chemistry unit 2?

 

[saba1996]

today my chem. over although still unprepared....2morow ill strt bio...so plz add me in threads fr bio.. btw who is going to appear in bio as well

Im doing bio too!

 

[saba1996]

can you also give physics unit 2 pls..

Im sorry i dont do physics :/

 

[kunal mike]

ok cool