Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
Vin:
--- Quote from: Shooting Star on June 05, 2010, 07:59:10 pm ---can some1 pls explain why theres no reaction when potassium hydroxide decomposes :-\
--- End quote ---
Sodium carbonate and Potassium carbonate, even when heated to a high temperature, do not decompose.
Sulphites of sodium and potassium do not decompose when heated.
Lowest oxides of metals (K2O, MgO, Al2O3) do not decompose when heated:: Exceptions Mercury and silver oxides decompose when heated, ZnO- yellow when hot, white when cool.
Don't ask why because they are not supposed to decompose WHEN HEATED.. ;)
$H00t!N& $t@r:
--- Quote from: mohit1234 on June 03, 2010, 09:38:11 am ---no problem.. ;)
anyways
the vol. of phosphate soln used in cm3 is half the height of the ppt in mm
also at 8cm3 all the soln is used up. tht is because adding more does not increase the height of the ppt meaning there was no further reaction on adding more.
also the formula is T3(PO4)2-----because
u take it as 12cm3 of T nitrate react with 8cm3 of sodium phosphate (thts wen all the reactants r used up)
so.....12:8...simplify it
12:8
6:4
3:2
and therefore u get T3(PO4)2
--- End quote ---
this answers ur question catalyst
$H00t!N& $t@r:
--- Quote from: ~VIN1094~ on June 05, 2010, 08:20:50 pm ---Sodium carbonate and Potassium carbonate, even when heated to a high temperature, do not decompose.
Sulphites of sodium and potassium do not decompose when heated.
Lowest oxides of metals (K2O, MgO, Al2O3) do not decompose when heated:: Exceptions Mercury and silver oxides decompose when heated, ZnO- yellow when hot, white when cool.
Don't ask why because they are not supposed to decompose WHEN HEATED.. ;)
--- End quote ---
k Thanks ill try to keep this in mind ;)
Vin:
--- Quote from: Shooting Star on June 05, 2010, 08:26:29 pm ---k Thanks ill try to keep this in mind ;)
--- End quote ---
There are more I guess.. I can't recollect them. Unfortunately nothing in the book :-\
rhea:
--- Quote from: ~VIN1094~ on June 05, 2010, 08:30:15 pm ---There are more I guess.. I can't recollect them. Unfortunately nothing in the book :-\
--- End quote ---
what about nitrite?
nd sulphite and carbntes of ONLY NA and K do not decompose?
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