The solubility constant can be affected by temperature, pressure, and molecular size, and it’s important for determining solubility, predicting if a precipitate will form, and understand the common ion effect.
Does KSP depend on temperature?
The solubility product is a kind of equilibrium constant and its value depends on temperature. Ksp usually increases with an increase in temperature due to increased solubility.
Why does KSP increase with temperature?
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
What determines KSP?
The solubility product constant, Ksp, is the equilibrium constant for a solid substance dissolving in an aqueous solution. It represents the level at which a solute dissolves in solution. The more soluble a substance is, the higher the Ksp value it has.
What is the relationship between the solubility product constant KSP and temperature?
The solubility of a solid is exponential with respect with temperature. A plot of the solubility product constant, Ksp, vs temperature (K) will give an exponential curve. and T = absolute temperature in degrees Kelvin.
What 4 factors affect solubility?
Factors affecting solubility
- Temperature. Basically, solubility increases with temperature. …
- Polarity. In most cases solutes dissolve in solvents that have a similar polarity. …
- Pressure. Solid and liquid solutes. …
- Molecular size. …
- Stirring increases the speed of dissolving.
Will increasing temperature always increase solubility?
Increasing the temperature will therefore increase the solubility of the solute. An example of a solute whose solubility increases with greater temperature is ammonium nitrate, which can be used in first-aid cold packs.
What is the effect of change of temperature on the solubility of a salt?
If we heat the solvent, the average kinetic energies of its molecules increases. Hence, the solvent is able to dislodge more particles from the surface of the solute. Thus, increasing the temperature increases the solubilities of substances. For example, sugar and salt are more soluble in water at higher temperatures.
Does temperature affect salt dissolving in water?
Yes, salt and other ionic compounds like it will dissolve faster the hotter the water it is dissolved in. This is because hot temperatures make atoms move quicker and the quicker they move, the easier they come apart!
Does a higher KSP precipitate first?
When two anions form slightly soluble compounds with the same cation, or when two cations form slightly soluble compounds with the same anion, the less soluble compound (usually, the compound with the smaller Ksp) generally precipitates first when we add a precipitating agent to a solution containing both anions (or …
When can you compare KSP values?
The relative MOLAR solubility of salts (saturated solution) can be determined by comparing Ksp values. The greater the Ksp the more ions are in solution, hence the greater the molar solubility.