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 happens to KSP when solubility increases?
Ksp (Solubility product constant) is the equilibrium between a solid and its respective ions in a solution. The value of the constant identifies the degree of which the compound can dissociate in water. For example the higher the Ksp the more soluble the compound is.
Is solubility directly proportional to KSP?
The higher the Ksp, the more soluble the compound is. … Ksp is used to describe the saturated solution of ionic compounds. (A saturated solution is in a state of equilibrium between the dissolved, dissociated, undissolved solid, and the ionic compound.)
What causes KSP to change?
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.
How does KSP predict solubility?
Set up an ICE problem (Initial, Change, Equilibrium) in order to use the Ksp value to calculate the concentration of each of the ions. The concentration of the ions leads to the molar solubility of the compound. Use the molar mass to convert from molar solubility to solubility.
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.
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.
Does Ksp increase with temperature?
If you increase the temperature more products will be formed. But on top of that, apparently the Ksp increases as well. This is different from adding more of A which shifts the reaction to the products side.
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.
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 …
Does agitation affect solubility?
Agitating a mixture by stirring or shaking the container increases the rate of dissolving. Agitation brings fresh solvent into contact with undissolved solute. Decreasing the size of the particles increases the rate of dissolving.