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Chemistry Tables

(1) Specific Heat, (2) Bond Enthalpies, (3) Thermodynamic Tables,
(4) Solubility Product, (5) Acid/Base Dissociation Constants (Ka, Kb), (6) Standard Reduction Potentials

Specific Heats (Csp)

Substance Formula Phase Csp (J/goC)
Aluminum Al solid 0.900
Cadmium Cd solid 0.232
Chromium Cr solid 0.448
Copper Cu solid 0.385
Diamond C solid 0.519
Gold Au solid 0.129
Graphite C solid 0.711
Helium He gas 5.19
Hydrogen H2 gas 14.3
Iodine I2 solid 0.427
Iron Fe solid 0.444
Krypton Kr gas 0.247
Lead Pb solid 0.159
Magnesium Mg solid 1.02
Mercury Hg liquid 0.138
Neon Ne gas 1.03
Nickel Ni solid 0.444
Nitrogen N2 gas 1.04
Oxygen O2 gas 0.916
Platinum Pt solid 0.133
Silicon Si solid 0.703
Silver Ag solid 0.237
Sulfur S solid 0.732
Tin Sn solid 0.213
Titanium Ti solid 0.523
Tungsten W solid 0.133
Uranium U solid 0.115
Water H2O liquid 4.184
Xenon Xe gas 0.158
Zinc Zn solid 0.388






AVERAGE BOND ENTHALPIES (kJ/mol) AT 25 oC

Single Bonds

H C N O F Si P S Cl Br I
H
436
413
391
463
565
318
322
347
432
366
299
C
413
346
305
358
485
---
---
272
339
285
213
N
391
305
163
201
283
---
---
---
192
243
---
O
463
358
201
146
184
452
335
---
218
201
201
F
565
485
283
184
155
565
490
284
253
249
278
Si
318
---
---
452
565
222
---
293
381
310
234
P
322
---
---
335
490
---
201
---
326
---
184
S
347
272
---
---
284
293
---
226
255
213
---
Cl
432
339
192
218
253
381
326
255
242
216
208
Br
366
285
243
201
249
310
---
213
216
193
175
I
299
213
---
201
278
234
184
---
208
175
151
 

Multiple Bonds

Double Bonds
(kJ/mol)		 Triple Bonds
(kJ/mol)
C=C
602
 C≡C
835
O=O
498
    
C=O
732
 C≡O
1072
N=O
607
    
N=N
418
 N≡N
945
C=N
615
 C≡N
887




Selected Thermodynamic Data at 298.15 Kelvin (25 oC)

Aluminum, Barium, Beryllium, Bromine, Cadmium, Calcium, Carbon, Chlorine, Chromium, Copper, Fluorine, Hydrogen, Iodine, Iron, Lead, Magnesium, Manganese, Mercury, Nickel, Nitrogen, Oxygen, Phosphorus, Potassium, Silicon, Silver, Sodium, Sulfur, Tin, Titanium, Uranium, Xenon, Zinc


Aluminum ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Al (s)
0
0
28.3
AlCl3 (s)
-704.2
-628.8
110.7
Al2O3 (s)
-1675.7
-1582.3
50.9
Al(OH)3 (s)
-1277.0
    

Barium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Ba (s)
0
0
67.0
BaCl2 (s)
-858.6
-810.4
123.7
BaCO3 (s)
-1219.0
-1139.0
112.0
BaO (s)
-553.5
-525.1
70.4
Ba(OH)2 (s)
-946.0
    
BaSO4 (s)
-1473.2
-1362.2
132.2

Beryllium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Be (s)
0
0
9.5
BeO (s)
-599.0
-569.0
14.0
Be(OH)2 (s)
-902.5
-815.0
51.9

Bromine ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Br (g)
111.9
82.4
175.0
Br2 (l)
0
0
152.2
Br2 (g)
30.9
3.1
245.5
Br2 (aq)
-3.0
4.0
130.0
Br- (aq)
-121.0
-175.0
82.0
BrF3 (g)
-255.6
-229.4
292.5
HBr (g)
-36.3
-53.5
198.7

Cadmium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Cd (s)
0
0
52.0
CdO (s)
-258.0
-228.0
55.0
Cd(OH)2 (s)
-561.0
-474.0
96.0
CdS (s)
-162.0
-156.0
65.0
CdSO4 (s)
-935.0
-823.0
123.0

Calcium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Ca (s)
0
0
41.4
Ca (g)
178.2
144.3
158.9
Ca2+ (g)
1925.9
    
CaC2 (s)
-59.8
-64.9
70.0
CaCO3 (s, calcite)
-1206.9
-1128.8
92.9
CaCl2 (s)
-795.8
-748.1
104.6
CaF2 (s)
-1219.6
-1167.3
68.9
CaH2 (s)
-186.2
-147.2
42.0
CaO (s)
-635.1
-604.0
39.8
CaS (s)
-482.4
-477.4
56.5
Ca(OH)2 (s)
-986.1
-898.5
83.4
Ca(OH)2 (aq)
-1002.8
-868.1
-74.5
Ca3(PO4)2 (s)
-4126.0
-3890.0
241.0
CaSO4 (s)
-1434.1
-1321.8
106.7
CaSiO3 (s)
-1630.0
-1550.0
84.0

Carbon ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
C (s, graphite)
0
0
5.7
C (s, diamond)
1.9
2.9
2.4
C (g)
716.7
671.3
158.1
CCl4 (l)
-135.4
-65.2
216.4
CCl4 (g)
-102.9
-60.6
309.9
CHCl3 (l)
-134.5
-73.7
201.7
CHCl3 (g)
-103.1
-70.3
295.7
CH4 (g)
-74.8
-50.7
186.3
CH3OH (g)
-200.7
-162.0
239.8
CH3OH (l)
-238.7
-166.3
126.8
H2CO (g)
-116.0
-110.0
219.0
HCOOH (g)
-363.0
-351.0
249.0
HCN (g)
135.1
125.0
202.0
C2H2 (g)
226.7
209.2
200.9
C2H4 (g)
52.3
68.2
219.6
CH3CHO (g, acetaldehyde)
-166.0
-129.0
250.0
C2H4O (g, ethylene oxide)
-53.0
-13.0
242.0
CH3CH2OH (l)
-277.7
-174.8
160.7
CH3CH2OH (g)
-235.1
-168.5
282.7
CH3COOH (l)
-484.0
-389.0
160.0
C2H6 (g)
-84.7
-32.8
229.6
C3H6 (g)
20.9
62.7
266.9
C3H8 (g)
-103.8
-23.5
269.9
CH2=CHCN (l)
152.0
190.0
274.0
C6H6 (l)
49.0
124.5
172.8
C6H12O6 (s)
-1275.0
-911.0
212.0
CO (g)
-110.5
-137.2
197.7
CO2 (g)
-393.5
-394.4
213.7
CS2 (g)
117.4
67.1
237.8
COCl2 (g)
-218.8
-204.6
283.5

Chlorine ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Cl (g)
121.7
105.7
165.2
Cl2 (g)
0
0
223.1
Cl2 (aq)
-23.0
7.0
121.0
Cl- (aq)
-167.0
-131.0
57.0
Cl- (g)
-233.1
    
HCl (g)
-92.3
-95.3
186.9
HCl (aq)
-167.2
-131.2
56.5

Chromium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Cr (s)
0
0
23.8
Cr2O3 (s)
-1139.7
-1058.1
81.2
CrO3 (s)
-579.0
-502.0
72.0
CrCl3 (s)
-556.5
-486.1
123.0

Copper ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Cu (s)
0
0
33.2
CuCl2 (s)
-220.1
-175.7
108.1
CuCO3 (s)
-595.0
-518.0
88.0
Cu2O (s)
-170.0
-148.0
93.0
CuO (s)
-157.3
-129.7
42.6
Cu(OH)2 (s)
-450.0
-372.0
108.0
CuS (s)
-49.0
-49.0
67.0

Fluorine ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
F2 (g)
0
0
202.8
F (g)
79.0
61.9
158.8
F- (g)
-255.4
    
F- (aq)
-332.6
-278.8
-13.8
HF (g)
-271.1
-273.2
173.8
HF (aq)
-332.6
-278.8
88.7

Hydrogen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
H2 (g)
0
0
130.7
H (g)
218.0
203.2
114.7
H+ (aq)
1536.2
    
OH- (aq)
-230.0
-157.0
-11.0
H2O (l)
-285.8
-237.1
69.9
H2O (g)
-241.8
-228.6
188.8
H2O2 (l)
-187.8
-120.4
109.6

Iodine ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
I2 (s)
0
0
116.1
I2 (g)
62.4
19.3
260.7
I2 (aq)
23.0
16.0
137
I (g)
106.8
70.3
180.8
I- (g)
-197.0
    
I- (aq)
-55.0
-52.0
106.0
ICl (g)
17.8
-5.5
247.6

Iron ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Fe (s)
0
0
27.8
Fe3C (s)
21.0
15.0
108.0
FeCl2 (s)
-341.8
-302.3
118.0
FeCl3 (s)
-399.5
-333.9
142.3
Fe0.95O (s) (wustite)
-264.0
-240.0
59.0
FeO (s)
-272.0
    
Fe3O4 (s, magnetite)
-1118.4
-1015.4
146.4
Fe2O3 (s, hematite)
-824.2
-742.2
87.4
FeS (s)
-95.0
-97.0
67.0
FeS2 (s, pyrite)
-178.2
-166.9
52.9
FeSO4 (s)
-929.0
-825.0
121.0
Fe(CO)5 (l)
-774.0
-705.3
338.1

Lead ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Pb (s)
0
0
64.8
PbCl2 (s)
-359.4
-314.1
136.0
PbO (s, yellow)
-217.3
-187.9
68.7
PbO2 (s)
-277.0
-217.0
69.0
PbS (s)
-100.4
-98.7
91.2
PbSO4 (s)
-920.0
-813.0
149.0

Magnesium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Mg (s)
0
0
32.7
MgCl2 (s)
-641.3
-591.8
89.6
MgCO3 (s)
-1095.8
-1012.1
65.7
MgO (s)
-601.7
-569.4
26.9
Mg(OH)2 (s)
-924.5
-833.5
63.2
MgS (s)
-346.0
-341.8
50.3

Manganese ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Mn (s)
0
0
32.0
MnO (s)
-385.0
-363.0
60.0
Mn3O4 (s)
-1387.0
-1280.0
149.0
Mn2O3 (s)
-971.0
-893.0
110.0
MnO2 (s)
-521.0
-466.0
53.0
MnO4- (aq)
-543.0
-449.0
190.0

Mercury ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Hg (l)
0
0
75.9
HgCl2 (s)
-224.3
-178.6
146.0
Hg2Cl2(s)
-265.4
-210.7
 191.7
HgO (s, red)
-90.8
-58.5
70.3
HgS (s, red)
-58.2
-50.6
82.4

Nickel ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Ni (s)
0
0
29.9
NiCl2 (s)
-305.3
-259.0
97.7
NiO (s)
-239.7
-211.7
38.0
Ni(OH)2 (s)
-538.0
-453.0
79.0
NiS (s)
-93.0
-90.0
53.0

Nitrogen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
N2 (g)
0
0
191.6
N (g)
472.7
455.6
153.3
NH3 (g)
-46.1
-16.5
192.5
NH3 (aq)
-80.0
-27.0
111.0
NH4+ (aq)
-132.0
-79.0
113.0
NO (g)
90.3
86.6
210.8
NOCl (g)
51.7
66.1
261.8
NO2 (g)
33.2
51.3
240.1
N2O (g)
82.1
104.2
219.9
N2O4 (g)
9.2
97.9
304.3
N2O4 (l)
-20.0
97.0
209.0
N2O5 (s)
-42.0
134.0
178.0
N2H4 (l)
50.6
149.3
121.2
N2H3CH3 (l)
54.0
180.0
166.0
HNO3 (aq)
-207.4
-111.3
146.4
HNO3 (l)
-174.1
-80.7
155.6
HNO3 (g)
-135.1
-74.7
266.4
NH4ClO4 (s)
-295.0
-89.0
186.0
NH4Cl (s)
-314.4
-202.9
94.6
NH4Cl (aq)
-299.7
-210.5
169.9
NH4NO3 (s)
-365.6
-183.9
151.1
NH4NO3 (aq)
-339.9
-190.6
259.8

Oxygen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
O2 (g)
0
0
205.1
O (g)
249.2
231.7
161.1
O3 (g)
142.7
163.2
238.9

Phosphorus ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
P (s, white)
0
0
164.4
P (s, red)
-70.4
-48.4
91.2
P (s, black)
-39.0
-33.0
23.0
P (g)
314.6
278.3
163.2
P4 (s, white)
0
0
41.1
P4 (s, red)
-17.6
-12.1
22.8
P4 (g)
59.0
24.0
280.0
PF5 (g)
-1578.0
-1509.0
296.0
PH3 (g)
5.4
13.4
210.2
PCl3 (g)
-287.0
-267.8
311.8
H3PO4 (l)
-1279.0
-1119.1
110.5
H3PO4 (aq)
-1288.0
-1143.0
158.0
P4O10 (s)
-2984.0
-2697.7
228.9

Potassium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
K (s)
0
0
64.2
KCl (s)
-436.7
-409.1
82.6
KClO3 (s)
-397.7
-296.3
143.1
KClO4 (s)
-433.0
-304.0
151.0
KI (s)
-327.9
-324.9
106.3
K2O (s)
-361.0
-322.0
98.0
K2O2 (s)
-496.0
-430.0
113.0
KO2 (s)
-283.0
-238.0
117.0
KOH (s)
-424.8
-379.1
78.9
KOH (aq)
-482.4
-440.5
91.6

Silicon ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Si (s)
0
0
18.3
SiBr4 (l)
-457.3
-443.9
277.8
SiC (s)
-65.3
-62.8
16.6
SiCl4 (g)
-657.0
-617.0
330.7
SiH4 (g)
34.3
56.9
204.6
SiF4 (g)
-1614.9
-1572.7
282.5
SiO2 (s, quartz)
-910.9
-856.6
41.8

Silver ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Ag (s)
0
0
42.6
Ag+ (aq)
105.0
77.0
73.0
AgBr (s)
-100.0
-97.0
107.0
AgCN (s)
146.0
164.0
84.0
AgCl (s)
-127.1
-109.8
96.2
Ag2CrO4 (s)
-712.0
-622.0
217.0
AgI (s)
-62.0
-66.0
115.0
Ag2O (s)
-31.1
-11.2
121.3
AgNO3 (s)
-124.4
-33.4
140.9
Ag2S (s)
-32.0
-40.0
146.0

Sodium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Na (s)
0
0
51.2
Na (g)
107.3
76.8
153.7
Na+ (g)
609.4
    
Na+ (aq)
-240.0
-262.0
59.0
NaBr (s)
-361.0
-349.0
86.8
Na2CO3 (s)
-1130.7
-1044.4
135.0
NaHCO3 (s)
-948.0
-852.0
102.0
NaCl (s)
-411.2
-384.1
72.1
NaCl (g)
-176.7
-196.7
229.8
NaCl (aq)
-407.3
-393.1
115.5
NaH (s)
-56.0
-33.0
40.0
NaI (s)
-288.0
-282.0
91.0
NaNO2 (s)
-359.0
    
NaNO3 (s)
-467.0
-366.0
116.0
Na2O (s)
-416.0
-377.0
73.0
Na2O2 (s)
-515.0
-451.0
95.0
NaOH (s)
-425.6
-379.5
64.5
NaOH (aq)
-470.1
-419.2
48.1

Sulfur ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
S (s, rhombic)
0
0
31.8
S (s, monoclinic)
0.3
0.1
33.0
S (g)
278.8
238.3
167.8
S2- (aq)
33.0
86.0
-15.0
S8 (g)
102.0
50.0
431.0
S2Cl2 (g)
-18.4
-31.8
331.5
SF6 (g)
-1209.0
-1105.3
291.8
H2S (g)
-20.6
-33.6
205.8
SO2 (g)
-296.8
-300.2
248.2
SO3 (g)
-395.7
-371.1
256.8
SOCl2 (g)
-212.5
-198.3
309.8
SO42- (aq)
-909.0
-745.0
20.0
H2SO4 (l)
-814.0
-690.0
156.9
H2SO4 (aq)
-909.3
-744.5
20.1

Tin ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Sn (s, white)
0
0
51.6
Sn (s, gray)
-2.1
0.1
44.1
SnCl4 (l)
-511.3
-440.1
258.6
SnCl4 (g)
-471.5
-432.2
365.8
SnO (s)
-285.0
-257.0
56.0
SnO2 (s)
-580.7
-519.6
52.3
Sn(OH)2 (s)
-561.0
-492.0
155.0

Titanium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Ti (s)
0
0
30.6
TiCl4 (l)
-804.2
-737.2
252.3
TiCl4 (g)
-763.2
-726.7
354.9
TiO2 (s)
-939.7
-884.5
49.9

Uranium ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
U (s)
0
0
50.0
UF6 (s)
-2137.0
-2008.0
228.0
UF6 (g)
-2113.0
-2029.0
380.0
UO2 (s)
-1084.0
-1029.0
78.0
U3O8 (s)
-3575.0
-3393.0
282.0
UO3 (s)
-1230.0
-1150.0
99.0

Xenon ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Xe (g)
0
0
170.0
XeF2 (g)
-108.0
-48.0
254.0
XeF4 (s)
-251.0
-121.0
146.0
XeF6 (g)
-294.0
    
XeO3 (s)
402.0
    

Zinc ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K)
Zn (s)
0
0
41.6
ZnCl2 (s)
-415.1
-369.4
111.5
ZnO (s)
-348.3
-318.3
43.6
Zn(OH)2 (s)
-642.0
    
ZnS (s, wurtzite)
-193.0
    
ZnS (s, zinc blende)
-206.0
-201.3
57.7
ZnSO4 (s)
-983.0
-874.0
120.0




Table of Solubility Product Constants (Ksp at 25 oC)

Type Formula Ksp
Bromides  PbBr2 6.3 x 10-6

 AgBr  3.3 x 10-13
Carbonates  BaCO3 8.1 x 10-9

CaCO3 3.8 x 10-9

CoCO3 8.0 x 10-13

CuCO3 2.5 x 10-10

FeCO3 3.5 x 10-11

PbCO3 1.5 x 10-13

MgCO3 4.0 x 10-5

MnCO3 1.8 x 10-11

NiCO3 6.6 x 10-9

Ag2CO3 8.1 x 10-12

ZnCO3 1.5 x 10-11
Chlorides PbCl2 1.7 x 10-5

AgCl  1.8 x 10-10
Chromates   BaCrO4 2.0 x 10-10

CaCrO4 7.1 x 10-4

PbCrO4 1.8 x 10-14

Ag2CrO4 9.0 x 10-12
Cyanides Ni(CN)2 3.0 x 10-23

AgCN 1.2 x 10-16

Zn(CN)2 8.0 x 10-12
Fluorides  BaF2 1.7 x 10-6

CaF2 3.9 x 10-11

PbF2 3.7 x 10-8

MgF2 6.4 x 10-9
Hydroxides  AgOH 2.0 x 10-8

Al(OH)3 1.9 x 10-33

Ca(OH)2 7.9 x 10-6

Cr(OH)3 6.7 x 10-31

Co(OH)2 2.5 x 10-16

Cu(OH)2 1.6 x 10-19

Fe(OH)2 7.9 x 10-15

Fe(OH)3 6.3 x 10-38

Pb(OH)2  2.8 x 10-16

Mg(OH)2  1.5 x 10-11

Mn(OH)2 4.6 x 10-14

Ni(OH)2 2.8 x 10-16

Zn(OH)2 4.5 x 10-17
Iodides  PbI2 8.7 x 10-9

AgI 1.5 x 10-16
Oxalates  BaC2O4 1.1 x 10-7

CaC2O4 2.3 x 10-9

MgC2O4 8.6 x 10-5
Phosphates AlPO4 1.3 x 10-20

Ba3(PO4)2 1.3 x 10-29

Ca3(PO4)2 1.0 x 10-25

CrPO4 2.4 x 10-23

Pb3(PO4)2 3.0 x 10-44

Ag3PO4 1.3 x 10-20

Zn3(PO4)2 9.1 x 10-33
Sulfates  BaSO4 1.1 x 10-10

CaSO4 2.4 x 10-5

PbSO4 1.8 x 10-8

Ag2SO4 1.7 x 10-5
Sulfides  CaS  8 x 10-6

CoS  5.9 x 10-21

CuS  7.9 x 10-37

FeS 4.9 x 10-18

Fe2S3 1.4 x 10-88

PbS  3.2 x 10-28

MnS 5.1 x 10-15

NiS 3.0 x 10-21

Ag2S  1.0 x 10-49

ZnS  2.0 x 10-25
Sulfites BaSO3 8.0 x 10-7

CaSO3 1.3 x 10-8

Ag2SO3 1.5 x 10-14





Acid/Base Ionization Constants at 25 oC

Acid 

Formula 

Ka1 

Ka2

Ka3

Acetic acid 

CH3COOH 

1.8x10-5 

 

 

Acetylsalicylic acid (aspirin)

HC9H7O4

3.0x10-4

 

 

Aluminum ion 

Al(H2O)43+ 

1.2x10-5 

 

 

Arsenic acid 

H3AsO4

2.5x10-4

5.6x10-8

3.0x10-13

Ascorbic acid

H2C6H6O6

7.9x10-5

1.6x10-12

 

Benzoic acid

C6H5COOH

6.3x10-5

 

 

Carbonic acid 

H2CO3 

4.2x10-7 

4.8x10-11

 

Ferric ion 

Fe(H2O)63+ 

4.0x10-3 

 

 

Formic acid 

HCOOH 

1.8x10-4 

 

 

Hydrocyanic acid 

HCN 

4.0x10-10 

 

 

Hydrofluoric acid 

HF 

7.2x10-4 

 

 

Hydrogen peroxide 

H2O2 

2.4x10-12 

 

 

Hydrosulfuric acid 

H2S 

1.0x10-7 

1.0x10-19

 

Hypochlorous acid

HClO 

3.5x10-8 

 

 

Nitrous acid 

HNO2 

4.5x10-4 

 

 

Oxalic acid 

H2C2O4 

5.9x10-2 

6.4x10-5

 

Phenol

C6H5OH

1.0x10-10

 

 

Phosphoric acid

H3PO4 

7.5x10-3 

6.2x10-8

3.6x10-13

Sulfuric acid

H2SO4 

very large 

1.2x10-2

 

Sulfurous acid

H2SO3

1.7x10-2

6.4x10-8

 

Zinc ion 

Zn(H2O)42+ 

2.5x10-10