How does ksp relate to solubility

Skip to main content. Search for:. How do you purify water? Summary The process of determining solubilities using K sp values is described.

Practice Read the material at the link below and do the problems at the end. Review What information is needed to carry out these calculations? What allows the calculation of molar solubility? First, we need to write out the two equations. In this section, we discuss the main factors that affect the value of the solubility constant.

Temperature Most solutes become more soluble in a liquid as the temperature is increased. Pressure Pressure can also affect solubility, but only for gases that are in liquids. Molecular Size Generally, solutes with smaller molecules are more soluble than ones with molecules particles. What's Next? Have friends who also need help with test prep? Share this article! Christine Sarikas. About the Author. Search the Blog Search. 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. As for everu solution, at equilibrium in given conditions we can write an expression like the one below for Silver chloride:. This constant is called solubility product constant or K sp. Main menu Ksp solubility product Solubility basics Solubility of alcohol Solubility of salts Water solubility.