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Chemistry P6 18/5/010

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WARRIOR:

--- Quote from: rahuldevnani93 on May 15, 2010, 07:23:52 pm ---Need may/june 2001 chemistry paper 6 mark scheme urgent !!
email to thunder.rahul@hotmail.com

--- End quote ---
cant find it online but i have it on my book..so if you want the asneers to anythin ask me..

6394:
amazing wrk  :) ;) :D ;D ::) :P
bt i dnt gt this part  PREPARATION OF SALTS
1.TITRATION METHOD.2.EXCESS REACTIVE METAL 3. EXCESS WEAK INSOL METHOD . 4PRECIPTATION
HEAT : NO                   /          NO                            /           YES +STIR                 /   NOP
RCTN. : NEURALISATION/  REDOX                             / NEURTALISATION                     / DOUBLE DCOMPOSITION
cn u xplain me a bit more detaild Thanks

WARRIOR:

--- Quote from: 6394 on May 16, 2010, 06:39:05 am ---amazing wrk  :) ;) :D ;D ::) :P
bt i dnt gt this part  PREPARATION OF SALTS
1.TITRATION METHOD.2.EXCESS REACTIVE METAL 3. EXCESS WEAK INSOL METHOD . 4PRECIPTATION
HEAT : NO                   /          NO                            /           YES +STIR                 /   NOP
RCTN. : NEURALISATION/  REDOX                             / NEURTALISATION                     / DOUBLE DCOMPOSITION
cn u xplain me a bit more detaild Thanks

--- End quote ---

sure
 but what do you want to know exactly..??

in conclusion
titration is used whn they ask you 2 make a soluble salt ex ( naso4) : we use hcl + naoh ..as naoh is soluble ..if u add any extra naoh the solution becomes alkalne..so we need to kno exact amoutns to obtain a salt of ph 7
excess reactive metal : make mgso4..just add magnesium ribbon to h2so4..and since mg is more reactiv than h it will displace and simple salt is formed
weak insol method : a metal thats weaker than hydrogen for ex.. cu(11) oxide..we do the same as ^ but we just haev to heat..!
preciptiation :  to make lead iodide (insol) we add 2 soluble stuff toogher and they make an insoluble ppt.. ADD LEAD NITRATE ADN POTASSIUM IODIDE :) 

so what do you want to knno exacgtly?

DEGO:
kimo cn u do me a favour whn u update ur post and add anything cn u post a reply to notify ys

WARRIOR:

--- Quote from: DEGO on May 16, 2010, 10:15:00 am ---kimo cn u do me a favour whn u update ur post and add anything cn u post a reply to notify ys

--- End quote ---
i update evrytime i learn somethin new form past papers! if u look again ull find new things ! By the way i just added a CLAMP to the appartus ..coincidence !

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