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Density of aqueous solutions of organic acids

Changes in density of aqueous solutions with changes in concentration at 20°C. Density of acetic acid, citric acid, formic acid, D-lactic acid, oxalic acid and trichloroacetic acid in water is plotted as function of wt%, mol/kg water and mol/l solution.

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Be aware of the concentration units in the figures:

wt%: Mass of solute/total mass of solution*100%

mol/kg: Molality = moles of solute/kg of water 

mol/liter: Molarity = moles of solute/liter of solution

Values are tabulated below the figures.

See also density of aqueous solutions of organic substances as sugars and alcohols, inorganic chlorides, inorganic sodium salts, inorganic potassium salts and some other inorganic substances

Density of aqueous solutions of organic acids


Density of aqueous solutions of organic acids


Density of aqueous solutions of organic acids


Density of aqueous solutions at 20°C, given as g/cm3:

Mass% Acetic acid Citric acid Formic acid D-Lactic acid Oxalic acid Trichloroacetic acid
1 0.9996 1.0022 1.0006 1.0002 1.0030 1.0034
5 1.0052 1.0189 1.0102 1.0086 1.0220 1.0230
10 1.0121 1.0402 1.0224 1.0199 1.0479
20 1.0250 1.0858 1.0467 1.0439 1.1035
30 1.0369 1.1346
40 1.0474 1.0935 1.0915 1.2188
50 1.0562 1.2803
60 1.1392
70 1.0673 1.1586
80 1.1848
100 1.0477
Density of acids solved in water at 20°C, given as wt%


Conversion of the concentration from mass% to mol/kg (moles of solute/kg of water = molality):

Mass% Acetic acid Citric acid Formic acid D-Lactic acid Oxalic acid Trichloroacetic acid
1 0.168 0.053 0.219 0.112 0.112 0.062
5 0.876 0.274 1.143 0.584 0.585 0.322
10 1.850 0.578 2.414 1.233 0.680
20 4.163 1.301 5.410 2.775 1.530
30 7.137 2.231
40 11.102 14.483 7.401 4.080
50 16.653 6.120
60 16.652
70 38.857 50.692
80 44.405
Mol/kg solution at 20°C


Conversion of the concentration from mass% to mol/liter (moles of solute/liter of solution = molarity):

Mass% Acetic acid Citric acid Formic acid D-Lactic acid Oxalic acid Trichloroacetic acid
1 0.166 0.052 0.217 0.111 0.111 0.061
5 0.837 0.265 1.097 0.560 0.568 0.313
10 1.685 0.541 2.221 1.132 0.641
20 3.414 1.254 4.548 2.318 1.351
30 5.180 1.772
40 6.977 9.502 4.847 2.984
50 8.794 3.918
60 7.588
70 12.441 17.619
80 10.522
100 17.447
Mol/liter solution at 20°C
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