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13 Dec 2019

Zn(OH)2 is a sparingly soluble salt. Assuming that [OH-] = 0.10 M, that this is sufficient for several zinc hydroxide complexes to form, and that each solution is saturated with Zn(OH)2:

Determine the molar solubility of Zn(OH)2 in this scenario.

Determine the concentration of each zinc-containing species in solution.

Zn(OH)2 (s) Zn(OH)+ Zn(OH)3- Zn(OH)42-

Ksp = 3.0 x 10-16 β1 = 2.5 x 104 β3 = 7.2 x 1015 β4 = 2.8 x 1015

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Nelly Stracke
Nelly StrackeLv2
17 Dec 2019

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Substance Ksp at 25 oC
Aluminum
Al(OH)3 1.9 x 10-33
Barium
Ba(OH)2 5.0 x 10-3
BaCO3 8.1 x 10-9
BaSO4 1.1 x 10-10
Ba3(PO4)2 3.4 x 10-23
Cadmium
Cd(OH)2 2.5 x 10-14
CdCO3 5.2 x 10-12
CdS 8.0 x 10-27
Calcium
Ca(OH)2 5.5 x 10-6
CaCO3 4.8 x 10-9
Ca3(PO4)2 1.0 x 10-26
CaF2 3.9 x 10-11
Chromium
Cr(OH)3 6.3 x 10-31
Cobalt
Co(OH)2 1.6 x 10-15
CoS 4.0 x 10-21
Copper
Cu(OH)2 2.2 x 10-20
Cu2S 1.6 x 10-48
CuCO3 1.4 x 10-10
CuS 6.3 x 10-36
Iron
Fe(OH)2 8.0 x 10-16
FeS 6.3 x 10-18
Fe(OH)3 2.5 x 10-39
FePO4 9.9 x 10-29
Lead
Pb(OH)2 2.8 x 10-16
PbF2 3.7 x 10-8
PbCl2 1.7 x 10-5
PbBr2 6.3 x 10-6
PbI2 6.5 x 10-9
PbCrO4 1.8 x 10-14
PbSO4 1.7 x 10-8
PbS 8.4 x 10-28
Magnesium
Mg(OH)2 1.8 x 10-11
Manganese
Mn(OH)2 1.9 x 10-13
MnCO3 8.8 x 10-11
MnS 5.6 x 10-16
Nickel
Ni(OH)2 1.6 x 10-14
Silver
AgCl 1.8 x 10-10
AgBr 5.0 x 10-13
AgI 8.3 x 10-17
AgCN 1.2 x 10-16
Ag2S 6.3 x 10-50
Ag2CrO4 1.1 x 10-12
Ag3PO4 2.6 x 10-18
Tin
Sn(OH)2 1.4 x 10-28
SnS 1.3 x 10-23
Zinc
ZnCO3 1.0 x 10-10
Zn(OH)2 4.5 x 10-17
ZnS 1.1 x 10-21

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 × 10-6

AgBr3.3 × 10-13CarbonatesBaCO38.1 × 10-9

CaCO33.8 × 10-9

CoCO38.0 × 10-13

CuCO32.5 × 10-10

FeCO33.5 × 10-11

PbCO31.5 × 10-13

MgCO34.0 × 10-5

MnCO31.8 × 10-11

NiCO36.6 × 10-9

Ag2CO38.1 × 10-12

ZnCO31.5 × 10-11ChloridesPbCl21.7 × 10-5

AgCl1.8 × 10-10ChromatesBaCrO42.0 × 10-10

CaCrO47.1 × 10-4

PbCrO41.8 × 10-14

Ag2CrO49.0 × 10-12CyanidesNi(CN)23.0 × 10-23

AgCN1.2 × 10-16

Zn(CN)28.0 × 10-12FluoridesBaF21.7 × 10-6

CaF23.9 × 10-11

PbF23.7 × 10-8

MgF26.4 × 10-9HydroxidesAgOH2.0 × 10-8

Al(OH)31.9 × 10-33

Ca(OH)27.9 × 10-6

Cr(OH)36.7 × 10-31

Co(OH)22.5 × 10-16

Cu(OH)21.6 × 10-19

Fe(OH)27.9 × 10-15

Fe(OH)36.3 × 10-38

Pb(OH)22.8 × 10-16

Mg(OH)21.5 × 10-11

Mn(OH)24.6 × 10-14

Ni(OH)22.8 × 10-16

Zn(OH)24.5 × 10-17IodidesPbI28.7 × 10-9

AgI1.5 × 10-16OxalatesBaC2O41.1 × 10-7

CaC2O42.3 × 10-9

MgC2O48.6 × 10-5PhosphatesAlPO41.3 × 10-20

Ba3(PO4)21.3 × 10-29

Ca3(PO4)21.0 × 10-25

CrPO42.4 × 10-23

Pb3(PO4)23.0 × 10-44

Ag3PO41.3 × 10-20

Zn3(PO4)29.1 × 10-33SulfatesBaSO41.1 × 10-10

CaSO42.4 × 10-5

PbSO41.8 × 10-8

Ag2SO41.7 × 10-5SulfidesCaS8 × 10-6

CoS5.9 × 10-21

CuS7.9 × 10-37

FeS4.9 × 10-18

Fe2S31.4 × 10-88

PbS3.2 × 10-28

MnS5.1 × 10-15

NiS3.0 × 10-21

Ag2S1.0 × 10-49

ZnS2.0 × 10-25SulfitesBaSO38.0 × 10-7

CaSO31.3 × 10-8

Ag2SO31.5 × 10-14

Ka&Kb-

Acetic acid

CH3COOH

1.8 × 10-5

Acetylsalicylic acid (aspirin)

HC9H7O4

3.0 × 10-4

Aluminum ion

Al(H2O)43+

1.2 × 10-5

Arsenic acid

H3AsO4

2.5 × 10-4

5.6 × 10-8

3.0 × 10-13

Ascorbic acid

H2C6H6O6

7.9 × 10-5

1.6 × 10-12

Benzoic acid

C6H5COOH

6.3 × 10-5

Carbonic acid

H2CO3

4.2 × 10-7

4.8 × 10-11

Ferric ion

Fe(H2O)63+

4.0 × 10-3

Formic acid

HCOOH

1.8 × 10-4

Hydrocyanic acid

HCN

4.0 × 10-10

Hydrofluoric acid

HF

7.2 × 10-4

Hydrogen peroxide

H2O2

2.4 × 10-12

Hydrosulfuric acid

H2S

1.0 × 10-7

1.0 × 10-19

Hypochlorous acid

HClO

3.5 × 10-8

Nitrous acid

HNO2

4.5 × 10-4

Oxalic acid

H2C2O4

5.9 × 10-2

6.4 × 10-5

Phenol

C6H5OH

1.0 × 10-10

Phosphoric acid

H3PO4

7.5 × 10-3

6.2 × 10-8

3.6 × 10-13

Sulfuric acid

H2SO4

very large

1.2 × 10-2

Sulfurous acid

H2SO3

1.7 × 10-2

6.4 × 10-8

Zinc ion

Zn(H2O)42+

2.5 × 10-10

Base

Formula

Kb

Ammonia

NH3

1.8 × 10-5

Aniline

C6H5NH2

7.4 × 10-10

Caffeine

C8H10N4O2

4.1 × 10-4

Codeine

C18H21O3N

8.9 × 10-7

Diethylamine

(C2H5)2NH

6.9 × 10-4

Dimethylamine

(CH3)2NH

5.9 × 10-4

Ethylamine

C2H5NH2

4.3 × 10-4

Hydroxylamine

NH2OH

9.1 × 10-9

Isoquinoline

C9H7N

2.5 × 10-9

Methylamine

CH3NH2

4.2 × 10-4

Morphine

C17H19O3N

7.4 × 10-7

Piperidine

C5H11N

1.3 × 10-3

Pyridine

C5H5N

1.5 × 10-9

Quinoline

C9H7N

6.3 × 10-10

Triethanolamine

C6H15O3N

5.8 × 10-7

Triethylamine

(C2H5)3N

5.2 × 10-4

Trimethylamine

(CH3)3N

6.3 × 10-5

Urea

N2H4CO

1.5 × 10-14

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