Density of aqueous solutions of inorganic potassium salts

Changes in density of aqueous solutions with changes in concentration at 20°C. Density of potassium salts 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.

Density of aqueous solutions of potassium salts

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

Mass%	Potassium bromide	Potassium carbonate	Potassium chloride	Potassium dihydrogen phosphate	Potassium hydrogen carbonate	Potassium hydrogen phosphate	Potassium hydroxide	Potassium iodide	Potassium nitrate	Potassium permanganate	Potassium sulfate
1	1.0054	1.0072	1.0046	1.0053	1.0046	1.0068	1.0068	1.0056	1.0045	1.0051	1.0062
5	1.035	1.0437	1.0304	1.0342	1.031	1.0412	1.0419	1.036	1.0298	1.0322	1.0388
10	1.074	1.0904	1.0633	1.0703	1.065	1.068	1.0873	1.0762	1.0627		1.0806
20	1.1601	1.1898	1.1328		1.1372		1.1818	1.1659	1.1326
30	1.2593	1.2755					1.2813	1.2712
40	1.3746	1.4142					1.3881	1.3959
50		1.5404					1.5024
Density at 20°C, given as g/cm3

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

Mass%	Potassium bromide	Potassium carbonate	Potassium chloride	Potassium dihydrogen phosphate	Potassium hydrogen carbonate	Potassium hydrogen phosphate	Potassium hydroxide	Potassium iodide	Potassium nitrate	Potassium permanganate	Potassium sulfate
1	0.085	0.073	0.135	0.074	0.101	0.058	0.18	0.061	0.1	0.064	0.058
5	0.442	0.381	0.706	0.387	0.526	0.302	0.938	0.317	0.521	0.333	0.302
10	0.934	0.804	1.490	0.816	1.11	0.499	1.98	0.669	1.099		0.638
20	2.101	1.809	3.353		2.497		4.456	1.506	2.473
30	3.601	2.814					7.639	2.582
40	5.602	4.824					11.882	4.016
50		7.236					17.82
Molality at 20°C, given as mol/kg water

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

Mass%	Potassium bromide	Potassium carbonate	Potassium chloride	Potassium dihydrogen phosphate	Potassium hydrogen carbonate	Potassium hydrogen phosphate	Potassium hydroxide	Potassium iodide	Potassium nitrate	Potassium permanganate	Potassium sulfate
1	0.084	0.073	0.135	0.074	0.1	0.058	0.179	0.061	0.099	0.064	0.058
5	0.435	0.378	0.691	0.380	0.515	0.299	0.929	0.312	0.509	0.327	0.298
10	0.903	0.789	1.426	0.786	1.064	0.491	1.938	0.648	1.051		0.62
20	1.95	1.722	3.039		2.272		4.213	1.405	2.24
28	3.175	2.584					6.851	2.297
40	4.62	4.03					9.896	3.364
50		5.573					13.389
Molarity at 20°C, given as mol/l solution

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