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.
What are the effects of KSP?
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. Solubility is defined as a property of a substance called solute to get dissolved in a solvent in order to form a solution.
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.
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 …
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).
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.
How does temperature affect the solubility of KHT?
The solubility of KHT (potassium hydrogen tartrate) in water increases with increasing temperature.
What is KSP formula?
In general, MaXb(s) <=> aM+b(aq) + bX–a(aq) is expressed as Ksp = [M+b]a[X−a]b. These expressions are called solubility product constant expressions because they involve the product of the equilibrium concentrations of the constituent ions, each raised to the power corresponding to the number of ions in the formula.
What happens if Q KSP?
If Q > Ksp, a precipitate will form. Note that precipitation may not happen immediately if Q is equal to or greater than Ksp. A solution could be supersaturated for some time until precipitation occurs. Fractional precipitation is a technique that separates ions from solution based on their different solubilities.
Will AgCl or Ag2CrO4 precipitate first?
When a concentrated solution of silver nitrate is added slowly, white AgCl(s) begins to precipitate. After most of the Cl–(aq) has been consumed, red Ag2CrO4(s) starts to precipitate.
Will a precipitate form when?
Sometimes ions in solution react with each other to form a new substance that precipitates; this reaction is called a precipitation reaction. A precipitate will form if any combination of cations and anions can become a solid.