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Calcium hydroxide is modestly soluble in water, as seen for many dihydroxides. Its solubility increases from 0.66 g/L at 100 °C to 1.89 g/L at 0 °C. [8] Its solubility product K sp of 5.02 × 10 −6 at 25 °C, [1] its dissociation in water is large enough that its solutions are basic according to the following dissolution reaction:
This page provides supplementary chemical data on calcium hydroxide. ... Dielectric constant, ... -22 x10 −6 cm 3 mol −1 [1] Density: 2.2 g cm −3 [2] Solubility ...
The tables below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure. Units of solubility are given in grams of substance per 100 millilitres of water (g/(100 mL)), unless shown otherwise.
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
Aluminium hydroxide: 14.43 Ammonium magnesium phosphate: 12.60 Barium carbonate: 8.09 Barium chromate: 9.62 (28 °C) Barium fluoride: 5.76 (25.8 °C) Barium iodate: 9.19 Barium oxalate: 6.66 (18 °C) Barium sulfate: 9.97 Cadmium oxalate: 7.82 (18 °C) Calcium carbonate: 8.06 Calcium fluoride: 10.40 (26 °C) Calcium iodate: 6.19 (18 °C) Calcium ...
The solubility constant is a special case of an equilibrium constant. Since it is a product of ion concentrations in equilibrium, it is also known as the solubility product. It describes the balance between dissolved ions from the salt and undissolved salt. The solubility constant is also "applicable" (i.e. useful) to precipitation, the reverse ...
The effect of the particle size on solubility constant can be quantified as follows: = + where *K A is the solubility constant for the solute particles with the molar surface area A, *K A→0 is the solubility constant for substance with molar surface area tending to zero (i.e., when the particles are large), γ is the surface tension ...
The solubility in water of the other hydroxides in this group increases with increasing atomic number. [18] Magnesium hydroxide Mg(OH) 2 is a strong base (up to the limit of its solubility, which is very low in pure water), as are the hydroxides of the heavier alkaline earths: calcium hydroxide, strontium hydroxide, and barium hydroxide.