Learning ObjectiveRecognize the assorted ions that cause a salt to typically be soluble/insoluble in water.

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Key PointsSolubility is the relative capacity of a solute to dissolve right into a solvent.Several factors influence the solubility the a offered solute in a given solvent. Temperature often plays the largest role, although pressure deserve to have a significant effect because that gases.To predict whether a compound will be soluble in a offered solvent, psychic the saying, “Like dissolves like.” extremely polar ionic compounds such as salt conveniently dissolve in polar water, however do not easily dissolve in non-polar solutions such as benzene or chloroform.
Termssolutethe compound that dissolves in systems (can be a solid, liquid, or gas)solubilitythe relative ability of a solute to dissolve right into a solventsolventthe compound (usually a liquid) the dissolves the solute

Definition that Solubility

Solubility is the ability of a solid, liquid, or gas chemical problem (referred to together the solute) come dissolve in solvent (usually a liquid) and type a solution. The solubility the a substance essentially depends on the solvent used, and also temperature and also pressure. The solubility the a problem in a details solvent is measure by the concentration of the saturation solution. A solution is taken into consideration saturated when adding additional solute no longer boosts the concentration that the solution.

The degree of solubility arrays widely depending upon the substances, indigenous infinitely dissolve (fully miscible), such as ethanol in water, to poorly soluble, such as silver chloride in water. The term “insoluble” is often used to poorly dissolve compounds. Under certain conditions, the equilibrium solubility have the right to be exceeded, yielding a supersaturated solution.

Solubility does not count on particle size; given enough time, even large particles will ultimately dissolve.

Factors affect Solubility


The solubility the a offered solute in a provided solvent commonly depends ~ above temperature. For plenty of solids liquified in liquid water, solubility often tends to exchange mail with increasing temperature. Together water molecules warm up, castle vibrate more quickly and are far better able to connect with and break personal the solute.

Solubilty of miscellaneous substances vs. Temperature changeSolubility increases with temperature for many substances; for example, an ext sugar will dissolve in warm water than in cold water.

The solubility that gases displays the opposite partnership with temperature; the is, together temperature increases, gas solubility tends to decrease. In a chart of solubility vs. Temperature, an alert how solubility tends to increase with boosting temperature for the salts and also decrease with increasing temperature because that the gases.


Pressure has a negligible impact on the solubility that solid and liquid solutes, but it has a solid effect on solutions with gaseous solutes. This is noticeable every time you open a soda can; the hissing sound indigenous the can is as result of the reality that its components are under pressure, i beg your pardon ensures the the soda stays carbonated (that is to say, the the carbon dioxide stays liquified in solution). The takeaway from this is that the solubility that gases tends to correlate with enhancing pressure.


A well-known saying provided for predicting solubility is “Like dissolves like.” This statement suggests that a solute will dissolve ideal in a solvent that has a comparable chemical structure; the capability for a solvent to dissolve assorted compounds depends mainly on its polarity. For example, a polar solute such as sugar is very soluble in polar water, less soluble in center polar methanol, and almost insoluble in non-polar solvents such together benzene. In contrast, a non-polar solute such together naphthalene is insoluble in water, moderately dissolve in methanol, and also highly soluble in benzene.

Solubility Chart

The solubility chart shows the solubility of countless salts. Salts of alkali steels (and ammonium), as well as those that nitrate and also acetate, are always soluble. Carbonates, hydroxides, sulfates, phosphates, and also heavy steel salts are frequently insoluble.

Solubility chartThe solubilities the salts formed from cations top top the left and anions on the peak are designated as: soluble (S), insoluble (I), or slightly dissolve (sS).

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SolubilitySolubility of salt and also gas solutes in fluid solvent.

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