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Precipitation

What is it?

When two aqueous solutions are mixed and a solid, the precipitate, is formed, a precipitation reaction has occurred. However, not all solutions that are mixed together will form a precipitate. If all substances present in the solution remain aqueous, no precipitate will have formed and everything remains as ions in the solution.

Solubility

What is it?

Solubility is the process of a solute dissolving in a solvent. Water is the universal solvent, meaning it can dissolve most substances. Of course, the golden rule of solubility is "like dissolves like," meaning that polar solvents will dissolve polar solutes and nonpolar solvents will dissolve nonpolar solutes.

When calculating the solubility equilibrium of a reaction involving the dissociation of an ionic solid, Ksp is used. Ksp is the symbol that represents the solubility product constant. It is different for every ionic solid.

Ksp

What is it?

Ksp stands for the solubility product constant for an equilibrium expression. different ionic solids have different Ksp values. The Ksp can be calculated as ([concentration of product1]*[concentration of product 2])/[concentration of reactant]. However, when calculating the Ksp, since we do not include any solids or liquids in the expression, and Ksp is only used with solid compounds, we do not include the solid reactant in the expression. Thus we are left with the final equation of Ksp = [concentration of product 1]*[concentration of product 2]. Also when calculating Kspthe coefficients in the reaction are correlated to the exponents in the expression. In other words, the exponents in the expression, are the coefficients in the equation.













Credits

Who Did What?

Beverly Li

Found the website hosting, did HTMLs, most of the Precipitation section - precipitation practice problems and answers, put outside links on the website, put recorded videos into the website, and double checked everything to make sure it's in order and working properly, SUPER KNOWS HER HTMLS!

Jennifer Ma

Made the background, footer, header, and link bar, did HTMLs, entire Solubility section - solubility rules, practice problems, and answers, common ion effect, practice problems and answers, Key Terms section, videotaped and took pictures of reactions done, put links in toolbar on the side, is da bomb.. BOOM!

Min Shan Lin

Selective precipitation, practice problems, and answers, Ksp Section, and said the website was not user friendly for males

Rachanna Kann

Writing Precipitation Reactions section, practice problems, and answers, uploaded videos onto Youtube, did you have to put on that wave?

Citations

Zumdahl, Steven S., and Susan A. Zumdahl. Chemistry. 7th Boston: Houghton Mifflin Company, 2007.