The solubility product constant is significantly less than 1 for a nearly insoluble compound such as PbF 2. Read the material at ChemTeam. Skip to main content. Search for:. Perform calculations involving molar solubility and K sp. How is baking soda made? Summary Molar solubility calculations are described. Calculations of K sp using molar solubility are described. Practice Read the material at ChemTeam. Review What are the solution requirements for determining molar solubility?
Here are the Ksp values for the three salts at 25 degrees Celsius. For silver chloride, it's 1. And for silver iodide, it's 8. When comparing salts that produce the same number of ions, the higher the value of Ksp, the higher the solubility of the salt. And since silver chloride has the highest Ksp value of these three, silver chloride is the most soluble salts.
For some insight into why this is true, let's look at the Ksp expression for silver chloride, which we can get from the balanced equation. The higher the value for Ksp, the higher the concentration of these ions at equilibrium, which means that more of the solid must have dissolved. Therefore, silver chloride has the highest solubility out of these three salts. Let's say we have some solid calcium fluoride that we add to pure water at 25 degrees Celsius.
Our goal is to calculate the Ksp for calcium fluoride at 25 degrees Celsius. The first step is to write out the dissolution equation for calcium fluoride. So 2F- also in aqueous solution. The next step is to use the balanced equation to write the Ksp expression. So here's our expression with 2. So the equilibrium concentration of fluoride anion must be 4.
And when you do the math, you get that Ksp for calcium fluoride is equal to 3. Ksp values can be difficult to measure and therefore different sources often give different values for Ksp at the same temperature.
For example, for calcium fluoride at 25 degrees Celsius, one source had Ksp equal to 3. Another one had 3. Since we got 3.
What is the solubility product of fluorite? First, write out the K sp expression, then substitute in concentrations and solve for K sp :. What is the solubility product for Mg OH 2? Calculate the molar solubility of copper bromide.
Solubility is defined as the maximum amount of solute that can be dissolved in a solvent at equilibrium. Equilibrium is the state at which the concentrations of products and reactant are constant after the reaction has taken place.
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