Qualification > Reference Material
Chemistry P6 18/5/010
DEGO:
yh i mean do a reply like look guys i updated ..... so we know and see it because its a long post to check every minor detail if its updated
6394:
--- Quote from: Kimo Jesus on May 16, 2010, 09:12:29 am ---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?
--- End quote ---
i dint get this part 2.EXCESS REACTIVE METAL 3. EXCESS WEAK INSOL METHOD Thanks 4 explaining
n this part as wel in reaction double decomposition ?????????
6394:
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..!
@ Kimo Jesus do u mean to say dat to mak this salt: cu(11) oxide u bring copper near O2 n heat it
I THNK M WRONG JUST CORRECT ME PLZZZ
thnk u ::) ;)
WARRIOR:
no sorry i meant to make CU(11)SULFATE..
we use cu ( 11) oxide and sullfuric acid. but copper (11) oxide cant react with h2so4 because hydrogen is more reactive thatn cu
so we heat.
and as for double displacement <--- this is what i meant ..sory m not well 2dya :P
doubel displacemnt cz LEAD NITRATE AND KOTASSIOUM IODIDE SWITCHED
LEAD IODIDE KOTASSIUM NITRATE
THEY SWTCHED SALTS :p anythin else?
6394:
--- Quote from: Kimo Jesus on May 16, 2010, 10:49:20 am ---no sorry i meant to make CU(11)SULFATE..
we use cu ( 11) oxide and sullfuric acid. but copper (11) oxide cant react with h2so4 because hydrogen is more reactive thatn cu
so we heat.
and as for double displacement <--- this is what i meant ..sory m not well 2dya :P
doubel displacemnt cz LEAD NITRATE AND KOTASSIOUM IODIDE SWITCHED
LEAD IODIDE KOTASSIUM NITRATE
THEY SWTCHED SALTS :p anythin else?
--- End quote ---
takin 2 mch tension ahan :P
well Thanks agn i gt it :) ;) :D
ya n hope gt wel soon
gud luk=D
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version