18. Hydrosulfuric solution. The H2S dissociates in two steps to form the S2-ion that then reacts with the metal ion in solution. By controlling the hydrogen ion concentration, the amount of sulfide in the solution can be controlled, and thus, very insoluble metal sulfides may be precipitated while other metals remain in solution. Given that for HaSa Kal -9.5 x 10, Kal -1.3 x 1014, Ksp for MnS 3.0 x 10-11, and that a saturated solution of H2S is approximately 0.100 M, calculate the hydrogen ion concentration required to prevent the precipitation of Mns. acid (H2Sag) was used for years in chemistry laboratories to precipitate metal sulfides from
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Related questions
I've noticed that recently most of my chemistry questions that get answered have also been incorrect. I cant help but feel like this is a discrepncy between either the methods used, or the values of the refreances when choosing Ka,Ksp,Kb, costants of the nature. In order to avoid this I will post 2 pictures. The fisrt one will be the question I am asking, and the second one will be a worked question of similar nature that I missed. I will also post the refrences that I am using. Please use the numbers off those refernces or the answer will be wrong. Thank
Asking:
Missing:
Charts:
Ksp-
BromidesPbBr26.3 Ã 10-6
AgBr3.3 Ã 10-13CarbonatesBaCO38.1 Ã 10-9
CaCO33.8 Ã 10-9
CoCO38.0 Ã 10-13
CuCO32.5 Ã 10-10
FeCO33.5 Ã 10-11
PbCO31.5 Ã 10-13
MgCO34.0 Ã 10-5
MnCO31.8 Ã 10-11
NiCO36.6 Ã 10-9
Ag2CO38.1 Ã 10-12
ZnCO31.5 Ã 10-11ChloridesPbCl21.7 Ã 10-5
AgCl1.8 Ã 10-10ChromatesBaCrO42.0 Ã 10-10
CaCrO47.1 Ã 10-4
PbCrO41.8 Ã 10-14
Ag2CrO49.0 Ã 10-12CyanidesNi(CN)23.0 Ã 10-23
AgCN1.2 Ã 10-16
Zn(CN)28.0 Ã 10-12FluoridesBaF21.7 Ã 10-6
CaF23.9 Ã 10-11
PbF23.7 Ã 10-8
MgF26.4 Ã 10-9HydroxidesAgOH2.0 Ã 10-8
Al(OH)31.9 Ã 10-33
Ca(OH)27.9 Ã 10-6
Cr(OH)36.7 Ã 10-31
Co(OH)22.5 Ã 10-16
Cu(OH)21.6 Ã 10-19
Fe(OH)27.9 Ã 10-15
Fe(OH)36.3 Ã 10-38
Pb(OH)22.8 Ã 10-16
Mg(OH)21.5 Ã 10-11
Mn(OH)24.6 Ã 10-14
Ni(OH)22.8 Ã 10-16
Zn(OH)24.5 Ã 10-17IodidesPbI28.7 Ã 10-9
AgI1.5 Ã 10-16OxalatesBaC2O41.1 Ã 10-7
CaC2O42.3 Ã 10-9
MgC2O48.6 Ã 10-5PhosphatesAlPO41.3 Ã 10-20
Ba3(PO4)21.3 Ã 10-29
Ca3(PO4)21.0 Ã 10-25
CrPO42.4 Ã 10-23
Pb3(PO4)23.0 Ã 10-44
Ag3PO41.3 Ã 10-20
Zn3(PO4)29.1 Ã 10-33SulfatesBaSO41.1 Ã 10-10
CaSO42.4 Ã 10-5
PbSO41.8 Ã 10-8
Ag2SO41.7 Ã 10-5SulfidesCaS8 Ã 10-6
CoS5.9 Ã 10-21
CuS7.9 Ã 10-37
FeS4.9 Ã 10-18
Fe2S31.4 Ã 10-88
PbS3.2 Ã 10-28
MnS5.1 Ã 10-15
NiS3.0 Ã 10-21
Ag2S1.0 Ã 10-49
ZnS2.0 Ã 10-25SulfitesBaSO38.0 Ã 10-7
CaSO31.3 Ã 10-8
Ag2SO31.5 Ã 10-14
Ka&Kb-
Acetic acid | CH3COOH | 1.8 Ã 10-5 | ||
Acetylsalicylic acid (aspirin) | HC9H7O4 | 3.0 Ã 10-4 | ||
Aluminum ion | Al(H2O)43+ | 1.2 Ã 10-5 | ||
Arsenic acid | H3AsO4 | 2.5 Ã 10-4 | 5.6 Ã 10-8 | 3.0 Ã 10-13 |
Ascorbic acid | H2C6H6O6 | 7.9 Ã 10-5 | 1.6 Ã 10-12 | |
Benzoic acid | C6H5COOH | 6.3 Ã 10-5 | ||
Carbonic acid | H2CO3 | 4.2 Ã 10-7 | 4.8 Ã 10-11 | |
Ferric ion | Fe(H2O)63+ | 4.0 Ã 10-3 | ||
Formic acid | HCOOH | 1.8 Ã 10-4 | ||
Hydrocyanic acid | HCN | 4.0 Ã 10-10 | ||
Hydrofluoric acid | HF | 7.2 Ã 10-4 | ||
Hydrogen peroxide | H2O2 | 2.4 Ã 10-12 | ||
Hydrosulfuric acid | H2S | 1.0 Ã 10-7 | 1.0 Ã 10-19 | |
Hypochlorous acid | HClO | 3.5 Ã 10-8 | ||
Nitrous acid | HNO2 | 4.5 Ã 10-4 | ||
Oxalic acid | H2C2O4 | 5.9 Ã 10-2 | 6.4 Ã 10-5 | |
Phenol | C6H5OH | 1.0 Ã 10-10 | ||
Phosphoric acid | H3PO4 | 7.5 Ã 10-3 | 6.2 Ã 10-8 | 3.6 Ã 10-13 |
Sulfuric acid | H2SO4 | very large | 1.2 Ã 10-2 | |
Sulfurous acid | H2SO3 | 1.7 Ã 10-2 | 6.4 Ã 10-8 | |
Zinc ion | Zn(H2O)42+ | 2.5 Ã 10-10 |
Base | Formula | Kb | ||
---|---|---|---|---|
Ammonia | NH3 | 1.8 Ã 10-5 | ||
Aniline | C6H5NH2 | 7.4 Ã 10-10 | ||
Caffeine | C8H10N4O2 | 4.1 Ã 10-4 | ||
Codeine | C18H21O3N | 8.9 Ã 10-7 | ||
Diethylamine | (C2H5)2NH | 6.9 Ã 10-4 | ||
Dimethylamine | (CH3)2NH | 5.9 Ã 10-4 | ||
Ethylamine | C2H5NH2 | 4.3 Ã 10-4 | ||
Hydroxylamine | NH2OH | 9.1 Ã 10-9 | ||
Isoquinoline | C9H7N | 2.5 Ã 10-9 | ||
Methylamine | CH3NH2 | 4.2 Ã 10-4 | ||
Morphine | C17H19O3N | 7.4 Ã 10-7 | ||
Piperidine | C5H11N | 1.3 Ã 10-3 | ||
Pyridine | C5H5N | 1.5 Ã 10-9 | ||
Quinoline | C9H7N | 6.3 Ã 10-10 | ||
Triethanolamine | C6H15O3N | 5.8 Ã 10-7 | ||
Triethylamine | (C2H5)3N | 5.2 Ã 10-4 | ||
Trimethylamine | (CH3)3N | 6.3 Ã 10-5 | ||
Urea | N2H4CO | 1.5 Ã 10-14 |