Qualification > Reference Material

Chemistry P6 18/5/010

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6394:
for solubility chart all ethanoates r soluble as wel
just a piece of info.

6394:
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 :) :)

6394:
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
                         

DEGO:
i can help u if u need any thing to be illustrated i ll do my best

WARRIOR:

--- 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 :) :)

--- End quote ---
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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