Alpha plot for a diprotic acid

9.20E-04 3.0364.31E-05 4.366

(tartaric acid)

pKa

Ka1

Ka2

0 1 2 3 4 5 6 7 8 9 10 11 12 13 140.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Copyright 2000 B.M. Tissue

0a 1a 2a

pH

a

Notes:Copyright 2000 Brian M. Tissue, all rights reserved.alpha-plot-diprotic.xlsver. 12/20/00

Change the Ka values in the gray boxes for different diprotic weak acids.

To get the alpha value at any given pH see the Raw Data sheet.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 140.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Copyright 2000 B.M. Tissue

0a 1a 2a

pH

a

[H+] pH1.00E+00 0.0 9.99E-01 9.19E-04 3.96E-087.94E-01 0.1 9.99E-01 1.16E-03 6.27E-086.31E-01 0.2 9.99E-01 1.46E-03 9.93E-085.01E-01 0.3 9.98E-01 1.83E-03 1.57E-073.98E-01 0.4 9.98E-01 2.31E-03 2.49E-073.16E-01 0.5 9.97E-01 2.90E-03 3.95E-072.51E-01 0.6 9.96E-01 3.65E-03 6.25E-072.00E-01 0.7 9.95E-01 4.59E-03 9.90E-071.58E-01 0.8 9.94E-01 5.77E-03 1.57E-061.26E-01 0.9 9.93E-01 7.25E-03 2.48E-061.00E-01 1.0 9.91E-01 9.12E-03 3.92E-067.94E-02 1.1 9.89E-01 1.14E-02 6.21E-066.31E-02 1.2 9.86E-01 1.44E-02 9.81E-065.01E-02 1.3 9.82E-01 1.80E-02 1.55E-053.98E-02 1.4 9.77E-01 2.26E-02 2.44E-053.16E-02 1.5 9.72E-01 2.83E-02 3.85E-052.51E-02 1.6 9.65E-01 3.53E-02 6.05E-052.00E-02 1.7 9.56E-01 4.41E-02 9.51E-051.58E-02 1.8 9.45E-01 5.49E-02 1.49E-041.26E-02 1.9 9.32E-01 6.81E-02 2.33E-041.00E-02 2.0 9.15E-01 8.42E-02 3.63E-047.94E-03 2.1 8.96E-01 1.04E-01 5.62E-046.31E-03 2.2 8.72E-01 1.27E-01 8.68E-045.01E-03 2.3 8.44E-01 1.55E-01 1.33E-033.98E-03 2.4 8.11E-01 1.87E-01 2.03E-033.16E-03 2.5 7.72E-01 2.25E-01 3.06E-032.51E-03 2.6 7.29E-01 2.67E-01 4.57E-032.00E-03 2.7 6.80E-01 3.13E-01 6.76E-031.58E-03 2.8 6.26E-01 3.64E-01 9.88E-031.26E-03 2.9 5.70E-01 4.16E-01 1.42E-021.00E-03 3.0 5.10E-01 4.69E-01 2.02E-027.94E-04 3.1 4.50E-01 5.21E-01 2.83E-026.31E-04 3.2 3.91E-01 5.70E-01 3.89E-025.01E-04 3.3 3.34E-01 6.13E-01 5.27E-023.98E-04 3.4 2.81E-01 6.49E-01 7.02E-023.16E-04 3.5 2.32E-01 6.76E-01 9.20E-022.51E-04 3.6 1.89E-01 6.92E-01 1.19E-012.00E-04 3.7 1.51E-01 6.98E-01 1.51E-011.58E-04 3.8 1.19E-01 6.93E-01 1.88E-011.26E-04 3.9 9.25E-02 6.76E-01 2.31E-011.00E-04 4.0 7.06E-02 6.50E-01 2.80E-017.94E-05 4.1 5.30E-02 6.14E-01 3.33E-016.31E-05 4.2 3.92E-02 5.71E-01 3.90E-015.01E-05 4.3 2.85E-02 5.23E-01 4.49E-013.98E-05 4.4 2.04E-02 4.71E-01 5.09E-013.16E-05 4.5 1.43E-02 4.17E-01 5.68E-012.51E-05 4.6 9.96E-03 3.65E-01 6.25E-012.00E-05 4.7 6.82E-03 3.15E-01 6.79E-011.58E-05 4.8 4.61E-03 2.68E-01 7.28E-011.26E-05 4.9 3.09E-03 2.26E-01 7.71E-01

a0 a1 a2

1.00E-05 5.0 2.04E-03 1.88E-01 8.10E-017.94E-06 5.1 1.34E-03 1.56E-01 8.43E-016.31E-06 5.2 8.76E-04 1.28E-01 8.71E-015.01E-06 5.3 5.68E-04 1.04E-01 8.95E-013.98E-06 5.4 3.66E-04 8.46E-02 9.15E-013.16E-06 5.5 2.35E-04 6.84E-02 9.31E-012.51E-06 5.6 1.51E-04 5.51E-02 9.45E-012.00E-06 5.7 9.61E-05 4.43E-02 9.56E-011.58E-06 5.8 6.12E-05 3.55E-02 9.64E-011.26E-06 5.9 3.89E-05 2.84E-02 9.72E-011.00E-06 6.0 2.47E-05 2.27E-02 9.77E-017.94E-07 6.1 1.56E-05 1.81E-02 9.82E-016.31E-07 6.2 9.91E-06 1.44E-02 9.86E-015.01E-07 6.3 6.27E-06 1.15E-02 9.88E-013.98E-07 6.4 3.96E-06 9.16E-03 9.91E-013.16E-07 6.5 2.51E-06 7.29E-03 9.93E-012.51E-07 6.6 1.58E-06 5.80E-03 9.94E-012.00E-07 6.7 1.00E-06 4.61E-03 9.95E-011.58E-07 6.8 6.32E-07 3.67E-03 9.96E-011.26E-07 6.9 3.99E-07 2.92E-03 9.97E-011.00E-07 7.0 2.52E-07 2.32E-03 9.98E-017.94E-08 7.1 1.59E-07 1.84E-03 9.98E-016.31E-08 7.2 1.00E-07 1.46E-03 9.99E-015.01E-08 7.3 6.33E-08 1.16E-03 9.99E-013.98E-08 7.4 4.00E-08 9.24E-04 9.99E-013.16E-08 7.5 2.52E-08 7.34E-04 9.99E-012.51E-08 7.6 1.59E-08 5.83E-04 9.99E-012.00E-08 7.7 1.00E-08 4.63E-04 1.00E+001.58E-08 7.8 6.34E-09 3.68E-04 1.00E+001.26E-08 7.9 4.00E-09 2.92E-04 1.00E+001.00E-08 8.0 2.52E-09 2.32E-04 1.00E+007.94E-09 8.1 1.59E-09 1.84E-04 1.00E+006.31E-09 8.2 1.01E-09 1.47E-04 1.00E+005.01E-09 8.3 6.34E-10 1.16E-04 1.00E+003.98E-09 8.4 4.00E-10 9.25E-05 1.00E+003.16E-09 8.5 2.52E-10 7.35E-05 1.00E+002.51E-09 8.6 1.59E-10 5.83E-05 1.00E+002.00E-09 8.7 1.01E-10 4.63E-05 1.00E+001.58E-09 8.8 6.34E-11 3.68E-05 1.00E+001.26E-09 8.9 4.00E-11 2.92E-05 1.00E+001.00E-09 9.0 2.52E-11 2.32E-05 1.00E+007.94E-10 9.1 1.59E-11 1.85E-05 1.00E+006.31E-10 9.2 1.01E-11 1.47E-05 1.00E+005.01E-10 9.3 6.34E-12 1.16E-05 1.00E+003.98E-10 9.4 4.00E-12 9.25E-06 1.00E+003.16E-10 9.5 2.52E-12 7.35E-06 1.00E+002.51E-10 9.6 1.59E-12 5.83E-06 1.00E+002.00E-10 9.7 1.01E-12 4.63E-06 1.00E+001.58E-10 9.8 6.34E-13 3.68E-06 1.00E+001.26E-10 9.9 4.00E-13 2.92E-06 1.00E+001.00E-10 10.0 2.52E-13 2.32E-06 1.00E+007.94E-11 10.1 1.59E-13 1.85E-06 1.00E+006.31E-11 10.2 1.01E-13 1.47E-06 1.00E+00

5.01E-11 10.3 6.34E-14 1.16E-06 1.00E+003.98E-11 10.4 4.00E-14 9.25E-07 1.00E+003.16E-11 10.5 2.52E-14 7.35E-07 1.00E+002.51E-11 10.6 1.59E-14 5.83E-07 1.00E+002.00E-11 10.7 1.01E-14 4.63E-07 1.00E+001.58E-11 10.8 6.34E-15 3.68E-07 1.00E+001.26E-11 10.9 4.00E-15 2.92E-07 1.00E+001.00E-11 11.0 2.52E-15 2.32E-07 1.00E+007.94E-12 11.1 1.59E-15 1.85E-07 1.00E+006.31E-12 11.2 1.01E-15 1.47E-07 1.00E+005.01E-12 11.3 6.34E-16 1.16E-07 1.00E+003.98E-12 11.4 4.00E-16 9.25E-08 1.00E+003.16E-12 11.5 2.52E-16 7.35E-08 1.00E+002.51E-12 11.6 1.59E-16 5.83E-08 1.00E+002.00E-12 11.7 1.01E-16 4.63E-08 1.00E+001.58E-12 11.8 6.34E-17 3.68E-08 1.00E+001.26E-12 11.9 4.00E-17 2.92E-08 1.00E+001.00E-12 12.0 2.52E-17 2.32E-08 1.00E+007.94E-13 12.1 1.59E-17 1.85E-08 1.00E+006.31E-13 12.2 1.01E-17 1.47E-08 1.00E+005.01E-13 12.3 6.34E-18 1.16E-08 1.00E+003.98E-13 12.4 4.00E-18 9.25E-09 1.00E+003.16E-13 12.5 2.52E-18 7.35E-09 1.00E+002.51E-13 12.6 1.59E-18 5.83E-09 1.00E+002.00E-13 12.7 1.01E-18 4.63E-09 1.00E+001.58E-13 12.8 6.34E-19 3.68E-09 1.00E+001.26E-13 12.9 4.00E-19 2.92E-09 1.00E+001.00E-13 13.0 2.52E-19 2.32E-09 1.00E+007.94E-14 13.1 1.59E-19 1.85E-09 1.00E+006.31E-14 13.2 1.01E-19 1.47E-09 1.00E+005.01E-14 13.3 6.34E-20 1.16E-09 1.00E+003.98E-14 13.4 4.00E-20 9.25E-10 1.00E+003.16E-14 13.5 2.52E-20 7.35E-10 1.00E+002.51E-14 13.6 1.59E-20 5.83E-10 1.00E+002.00E-14 13.7 1.01E-20 4.63E-10 1.00E+001.58E-14 13.8 6.34E-21 3.68E-10 1.00E+001.26E-14 13.9 4.00E-21 2.92E-10 1.00E+001.00E-14 14.0 2.52E-21 2.32E-10 1.00E+00