Qualification > Sciences
Any Chem AS question to be posted here :):)
Amelia:
For eg:- The Solubility Product of Mg(OH)2 is 1.00x10-12
Mg(OH)2----->Mg2++2OH-
Ratio = 1 : 1 : 2
(2+1 = 3)
Ksp = [Mg2+]3
find the cuberoot of 1.00x10-12 = 1x10-4 (this answer will be for Mg2+ since its ratio is 1)
For OH- = 2x1x10-4 = 2x10-4
Since it is 2OH-, we do 2x10-4 = 4x10-8
Amelia:
I'll give another example with the same numbers.
The solubility product of Siver Chromate (Ag2CrO4)at 25degree celcius is 1.00x10-12.
Calculate the solubility of silver chromate in moldm-3 at this temperature.
Ag2CrO4----->2Ag2++CrO42-
Ratio = 1:2:1
Ksp = [Ag2+]3
cube root of 1.00x10-12 = 1x10-4 for chromate.
2x1x10-4 = 2 x10-4 for Ag2+ multiply this by 2
AS-Girl:
Another question...i know i made all of u teird from my questions!!
25. If the solubility product (Ksp) for lead oxalate (PbC2O4) is equal to 8.5 x 10-9,
what is the molar solubility of a saturated solution of lead oxalate?
(a) 8.5 x 10+9 mole / liter (c) 9.2 x 10-5 mole / liter
(b) 9.2 x 10+5 mole / liter (d) 8.5 x 10-9 mole / liter
??:S :S
Haaks18:
Is This Chemistry AS edexcel :/
Amelia:
--- Quote from: AS-Girl on November 27, 2010, 08:24:55 pm ---Another question...i know i made all of u teird from my questions!!
25. If the solubility product (Ksp) for lead oxalate (PbC2O4) is equal to 8.5 x 10-9,
what is the molar solubility of a saturated solution of lead oxalate?
(a) 8.5 x 10+9 mole / liter (c) 9.2 x 10-5 mole / liter
(b) 9.2 x 10+5 mole / liter (d) 8.5 x 10-9 mole / liter
??:S :S
--- End quote ---
You have asked this question before(And Deadly_King had already solved it.). The only difference is that the question is the other way round. ;)
https://studentforums.biz/sciences-149/chemistry-people-come-in!!/
@Haaks - I dont know, but I've answered your questions above. :P
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