The relationship between [tex][Ca2^{2+}][/tex] and [tex][OH^{-}][/tex] in this mixture is that there are 2 mole of hydroxide ions for every 1 mole of calcium ions.
The solubility of a solute is the amount of solute that can dissolve in a given volume of solvent at a particular temperature.
Calcium hydroxide is partially soluble in water. The dissolution of calcium hydroxide in water produces calcium ions and hydroxide ions.
The equation of the reaction is given below:
[tex]Ca(OH)_{2} \leftrightharpoons Ca^{2+} + 2\:OH^{-}[/tex]
Based on the equation of reaction, there are 2 mole of hydroxide ions for every mole of calcium ions.
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