From: Surface stoichiometry of zinc sulfide and its effect on the adsorption behaviors of xanthate
(1) Acid-base reactions | Log K | No. |
---|---|---|
H+ + HS- <=> H2S | 6.99 | (1) |
H+ + HS- <=> H2S(g) | 7.99 | (2) |
HS- <=> H+ + S2- | -19.0 | (3) |
H2O <=> H+ + OH- | -14.00 | (4) |
Zn2+ + 2 HS- <=> Zn(HS)2 | 12.82 | (5) |
Zn2+ + 3 HS- <=> Zn(HS)3- | 16.1 | (6) |
Zn2+ + 4 HS- <=> Zn(HS)42- | 14.64 | (7) |
Zn2+ + 2 H2O <=> 2 H+ + Zn(OH)2 | -16.4 | (8) |
Zn2+ + 3 H2O <=> 3 H+ + Zn(OH)3- | -28.2 | (9) |
Zn2+ + 4 H2O <=> 4 H+ + Zn(OH)4- | -41.3 | (10) |
2 Zn2+ + 6 H2O <=> 6 H+ + Zn2(OH)62- | -54.3 | (11) |
2 Zn2+ + H2O <=> H+ + Zn2OH3+ | -9.0 | (12) |
4 Zn2+ + 4 H2O <=> 4 H+ + Zn4(OH)44+ | -27.0 | (13) |
Zn2+ + H2O <=> H+ + ZnOH+ | -7.5 | (14) |
Zn2+ + 2 HS- <=> H+ + ZnS(HS)- | 6.84 | (15) |
Zn2+ + 3 HS- <=> H+ + ZnS(HS)22- | 6.15 | (16) |
(2)Redox reactions | ||
2 H+ + 2e- <=> H2 | -3.15 | (17) |
2 H+ + 2e- <=> H2(g) | 0.0 | (18) |
2 H2O <=> 2 H+ + 2e- + H2O2 | -59.60 | (19) |
4 HS- <=> 2 H+ + 6e- + H2S4 | 7.88 | (20) |
5 HS- <=> 3 H+ + 8e- + H2S5 | 8.99 | (21) |
4 HS- <=> 3 H+ + 6e- + HS4- | 3.68 | (22) |
5 HS- <=> 4 H+ + 8e- + HS5- | 5.09 | (23) |
2 H2O <=> 4 H+ + 4e- + O2 | -86.08 | (24) |
2 H2O <=> 4 H+ + 4e- + O2(g) | -83.12 | (25) |
3 H2O <=> 6 H+ + 6e- + O3 | -156.05 | (26) |
3 H2O <=> 6 H+ + 6e- + O3(g) | -153.25 | (27) |
2 HS- <=> 2 H+ + 3e- + S2- | -5.09 | (28) |
2 HS- <=> 2 H+ + 2e- + S22- | -12.73 | (29) |
2 HS- + 3 H2O <=> 8 H+ + 8e- + S2O32- | -28.79 | (30) |
3 HS- <=> 3 H+ + 4e- + S32- | -7.27 | (31) |
4 HS- <=> 4 H+ + 6e- + S42- | -3.022 | (32) |
5 HS- <=> 5 H+ + 8e- + S52- | -1.007 | (33) |
6 HS- <=> 6 H+ + 10e- + S62- | 0.84 | (34) |
HS- + 3 H2O <=> 7 H+ + 6e- + SO32- | -37.09 | (35) |
HS- + 4 H2O <=> 9 H+ + 8e- + SO42- | -33.69 | (36) |
2 HS- + 3 H2O <=> 6 H+ + 8e- + H2S2O3 | -26.52 | (37) |
HS- + 4 H2O <=> 7 H+ + 8e- + H2SO4 | -33.70 | (38) |
2 H2O <=> 3 H+ + 2e- + HO2- | -71.25 | (39) |
2 HS- + 3 H2O <=> 7 H+ + 8e- + HS2O3- | -27.11 | (40) |
HS- + 3 H2O <=> 6 H+ + 6e- + HSO3- | -29.87 | (41) |
HS- + 4 H2O <=> 8 H+ + 8e- + HSO4- | -31.71 | (42) |
2 HS- + 6 H2O <=> 14 H+ + 14e- + S2O62- | -75.43 | (43) |
2 HS- + 8 H2O <=> 18 H+ + 18e- + S2O82 | -133.65 | (44) |
4 HS- + 6 H2O <=> 16 H+ + 18e- + S4O62- | -54.88 | (45) |
HS- + 2 H2O <=> 5 H+ + 6e- + SO2(aq) | -28.03 | (46) |
HS- + 2 H2O <=> 5 H+ + 6e- + SO2(g) | -28.35 | (47) |
Zn2+ + 8 H2O + 2 HS- <=> 18 H+ + 16e- + Zn(SO4)22- | -64.10 | (48) |
Zn2+ + 16 H2O + 4 HS- <=> 36 H+ + 32 e- + Zn(SO4)46- | -133.07 | (49) |
Zn2+ + 3 H2O + 2 HS- <=> 8 H+ + 8e- + ZnS2O3 | -26.49 | (50) |
Zn2+ + 4 H2O + HS- <=> 9 H+ + 8e- + ZnSO4 | -31.32 | (51) |
3) Precipitation and dissolution reactions | ||
Zn2+ + 2 H2O <=> 2 H+ + Zn(OH)2(s) | -12.45 | (52) |
HS- <=> H+ + 2e- + S(s) | 2.15 | (53) |
2e- + Zn2+ = Zn(c) | -25.76 | (54) |
Zn2+ + HS- <=> H+ + ZnS(s) | 9.06 | (55) |
2 Zn2+ + 6 H2O + HS- <=> 11 H+ + 8e- + Zn2(OH)2SO4(s) | -41.19 | (56) |
3 Zn2+ + 9 H2O +2 HS- <=> 20 H+ + 16e- + Zn3O(SO4)2(s) | -86.40 | (57) |
4 Zn2+ +10 H2O + HS- <=> 15 H+ + 8e- + Zn4(OH)6SO4(s) | -62.09 | (58) |
Zn2+ + 4 H2O + HS- <=> 9 H+ + 8e- + ZnSO4(s) | -36.70 | (59) |
Zn2+ + HS- <=> 9 H+ + 8e- + ZnSO4·6 H2O(s) | -31.93 | (60) |
Zn2+ + HS- <=> 9 H+ + 8e- + ZnSO4·7 H2O(s) | -31.73 | (61) |
(4) Surface complexation reactions* | ||
≡SZn + H+ <=> ≡ZnSH+ | 6.91 | (62) |
≡SZn + H2O <=> ≡SZnOH- + H+ | -10.28 | (63) |
≡SZn + 2H+ <=> ≡SH2 + Zn2+ | 9.59 | (64) |