The solubility product CONSTANT is Ksp. It doesn’t change if the concentrations change, otherwise it wouldn’t be a constant! The only thing that can change a solubility product CONSTANT is temperature. Not concentrations, acids, bases, salts, radiation, or divine intervention.
Can the value of Ksp change?
The value of K s p varies depending on the solute. The more soluble a substance is, the higher its K s p chemistry value. … This would mean the K s p unit would be different for every problem and would be difficult to solve, so in order to make it simpler, chemists generally drop K s p units altogether.
What can affect the Ksp value?
What factors affect the value of Ksp?
- The common-ion effect (the presence of a common ion lowers the value of Ksp).
- The diverse-ion effect (if the ions of the solutes are uncommon, the value of Ksp will be high).
- The presence of ion-pairs.
What causes Ksp to increase?
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.
Is Ksp affected by concentration?
Ksp is defined in terms of activity rather than concentration because it is a measure of a concentration that depends on certain conditions such as temperature, pressure, and composition. It is influenced by surroundings. 3. … Ksp is used to describe the saturated solution of ionic compounds.
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 …
How is KSP calculated?
Let’s do an example: The solubility of Ag2CrO4 in water is 1.31 x 10-4 moles/L. Calculate the value of Ksp . Using mole ratios, the [Ag+] will go up by (2 x 1.31 x 10-4 moles/L) = 2.62 x 10-4 moles/L.
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.
Why does KSP increase with temperature?
An increase in temperature puts a stress on the equilibrium condition and causes it to shift to the right. The stress is relieved because the dissolving process consumes some of the heat. Therefore, the solubility (concentration) increases with an increase in temperature. If the process is exothermic (heat given off).
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.
Does pH affect solubility?
For ionic compounds containing basic anions, solubility increases as the pH of the solution is decreased. For ionic compounds containing anions of negligible basicity (such as the conjugate bases of strong acids), solubility is unaffected by changes in pH.