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Author Topic: Chemistry P6 18/5/010  (Read 24967 times)

Offline DEGO

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Re: Chemistry P6 18/5/010
« Reply #30 on: May 16, 2010, 10:23:05 am »
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
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6394

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Re: Chemistry P6 18/5/010
« Reply #31 on: May 16, 2010, 10:38:37 am »
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?
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 ?????????
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6394

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Re: Chemistry P6 18/5/010
« Reply #32 on: May 16, 2010, 10:45:02 am »
 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 ::) ;)
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Offline WARRIOR

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Re: Chemistry P6 18/5/010
« Reply #33 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?
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6394

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Re: Chemistry P6 18/5/010
« Reply #34 on: May 16, 2010, 11:24:32 am »
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?
takin 2 mch tension ahan :P
well Thanks agn i gt it   :) ;) :D
ya n hope  gt wel soon
gud luk=D
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6394

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Re: Chemistry P6 18/5/010
« Reply #35 on: May 16, 2010, 12:11:49 pm »
for solubility chart all ethanoates r soluble as wel
just a piece of info.
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6394

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Re: Chemistry P6 18/5/010
« Reply #36 on: May 16, 2010, 12:27:52 pm »
n u cn add 1 more thing under preparation of salts
FILTERATION
metal or metal oxide or metal carbonate + dil. acid --> soluble salt
step1: excess of the solid is added 2 the dil acid  and warmed /heated {NEVER ADD EXCESS OF ACID  N DONT USE CONC. ACID because IT IS HEATED  }
step 2 ": excess solid is filtrd out
step 3 : filterate is evaporated gently to concentrate the salt solution .
step 4: conc solution is lft 2 coold so dat crystals r formed .the crystals are filtered , washed n dryed carefully btwn the folds of filter ppr
<washd by adding min. of cold water , dnt add hot watr it will dissolve >
MAZIT are the metals used with the dil acid
hope it helpd :) :)
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6394

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Re: Chemistry P6 18/5/010
« Reply #37 on: May 16, 2010, 12:37:36 pm »
n u cn add this aswel upward delivery : gases less dense dan air eg:H2 NH3
                             downward delivery: gasses more dense den air eg:hydrogen chloide ,CO2
                            displacement of water :for insoluble gases eg:hydrogen methane
                         
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Offline DEGO

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Re: Chemistry P6 18/5/010
« Reply #38 on: May 16, 2010, 02:27:02 pm »
i can help u if u need any thing to be illustrated i ll do my best
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Offline WARRIOR

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Re: Chemistry P6 18/5/010
« Reply #39 on: May 16, 2010, 03:04:46 pm »
Quote from: 6394 on May 16, 2010, 12:27:52 pm
n u cn add 1 more thing under preparation of salts
FILTERATION
metal or metal oxide or metal carbonate + dil. acid --> soluble salt
step1: excess of the solid is added 2 the dil acid  and warmed /heated {NEVER ADD EXCESS OF ACID  N DONT USE CONC. ACID because IT IS HEATED  }
step 2 ": excess solid is filtrd out
step 3 : filterate is evaporated gently to concentrate the salt solution .
step 4: conc solution is lft 2 coold so dat crystals r formed .the crystals are filtered , washed n dryed carefully btwn the folds of filter ppr
<washd by adding min. of cold water , dnt add hot watr it will dissolve >
MAZIT are the metals used with the dil acid
hope it helpd :) :)
well its basically the same thing isaid excpt that its wrong to heat the metal carbonate with acid..cz the  reaction would be extremely vgorus! and this is the the same as EXCESS METHD AND EXCESS RELATIVLY INSOLUBL metal ..i think is mine is fine but just a bit disorganized lets say :P  but MAZIT IS USEFUL :p alrtite thank you

and ill add that  6394 !!! thank you
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NO secrets to SUCCESS , it is the result of 1.HARD WORK 2.GOOD PREPARATION 3.LEARNING FROM FAILURE
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Offline WARRIOR

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Re: Chemistry P6 18/5/010
« Reply #40 on: May 16, 2010, 03:22:52 pm »
updates collections of gases + ehanotas is soluble ! ( in solubilty place ) + in preparatoin of salts.. MAZIT REACT IWTH ACIDSS..
« Last Edit: May 16, 2010, 03:25:16 pm by Kimo Jesus »
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NO secrets to SUCCESS , it is the result of 1.HARD WORK 2.GOOD PREPARATION 3.LEARNING FROM FAILURE
But it ain't how hard you hit; it's about how hard you can get hit, and keep moving forward-Balboa

Offline DEGO

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Re: Chemistry P6 18/5/010
« Reply #41 on: May 16, 2010, 03:44:50 pm »
dont forget tht K ,NA , CAN REACT WITH ACID  but it is unsafe (vigrouse) ;D
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Offline WARRIOR

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Re: Chemistry P6 18/5/010
« Reply #42 on: May 16, 2010, 05:32:32 pm »
715 views  :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o


I hope you came out of here with something lol :P :P ::)
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NO secrets to SUCCESS , it is the result of 1.HARD WORK 2.GOOD PREPARATION 3.LEARNING FROM FAILURE
But it ain't how hard you hit; it's about how hard you can get hit, and keep moving forward-Balboa

6394

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Re: Chemistry P6 18/5/010
« Reply #43 on: May 16, 2010, 05:44:29 pm »
Quote from: Kimo Jesus on May 16, 2010, 05:32:32 pm
715 views  :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o


I hope you came out of here with something lol :P :P ::)
rofl :>
:p
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Offline DEGO

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Re: Chemistry P6 18/5/010
« Reply #44 on: May 16, 2010, 05:48:09 pm »
rofl lol XD
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