The oral route of drug administration is the most common and preferred method of delivery due to convenience and ease of ingestion. Always have this table with you on a test! Chemistry 12 Unit 3 - Solubility of Ionic Substances Tutorial 10 - Ksp Calculations Page 3 First we obtain a sheet entitled “Solubility Product Constants at 25 ºC” This has Ksp’s for many of the “Low Solubility Compounds” listed. From a patient’s perspective, swallowing a dosage form is a comfortable and a familiar means of taking medication. • be able to calculate K sp from solubility and from experimental data. Solubility Calculations If IAP>Ksp, then SI is +ve. Therefore, K sp = [Mg 2+(aq)][CO 3 2−(aq)] Statement: The solubility product constant equation for the solubility equilibrium is K sp = [Mg 2+(aq)][CO 3 2−(aq)] 2. (Solubility product constant) is the equilibrium between a solid and its respective ions in a solution. 11/09/14 24 Calculating solubility from K sp! sp and Molar Solubility Problems Worksheet 1. Solubility Calculations Solubility Product, Ksp Ion Activity Product, IAP Saturation Index, SI Solubility Reaction Relationship to equilibrium constant Product of free ion species activities SI = log (IAP/Ksp) Solid phase, dissociated species. Write balanced equations and solubility product expressions for the following compounds a. CuBr b. ZnC2O4 c. Ag2CrO4 d. Hg2Cl2 e. AuCl3 f. Mn3(PO4)3 3. K sp Solubility Product Constant In general, when ionic compounds dissolve in water, they go into solution as ions. So, … However, the solubility products are more useful than In contrast the solubility product for a given solute is constant at a specific temperature, and K sp values are tabulated in the chemistry handbooks. Step 1: Use equilibrium expression & K sp value to determine concentrations of cations and anions.!! Section 7.6: Solubility Equilibria and the Solubility Product Constant Tutorial 1 Practice, page 462 1. Mineral precipitates. Use the chemical AgCl to describe solubility, molar solubility and solubility product 2. Step 2: Use ion concentrations to determine molar solubility.! Other Aspects of Ionic Equilibria 1 Solubility of Salts, the Solubility Product Constant and Precipitation Key Learning Outcomes-The successful 1C student will: • be able to write the mathematical K sp equation for solubility equilibria of slightly soluble ionic compounds in water. When the solution becomes saturated with ions, that is, unable to hold any more, the excess solid settles to the bottom of the container and an equilibrium is established between the undissolved solid and the dissolved ions. CH 125 Lecture 3 Solubility and Solubility-Product Constants Equilibrium Constant (Solubility-Product Constant) • When a sparingly soluble salt dissolves in an aqueous solution it usually completely dissociates into its component ions. ! Title: Microsoft Word - Solubility and solubility product.doc Author: Francis B Banks Created Date: 4/19/2013 10:50:39 AM For example the higher the Ksp the more soluble the compound is. The value of the constant identifies the degree of which the compound can dissociate in water. Experiment # 10: Solubility Product Determination When a chemical species is classified as “insoluble”, this does not mean that none of the compound dissolves in the given solvent or solution system. In reality, a measurable level of material does go into Solution: [MgCO 3(s)] is constant, so it is not included in the equation. Solubility products, K sp, of salts are indirect indication of their solubilities expressed in mol dm-3 (called molar solubility). Calculate the solubility product of the salt. • The molar solubility of silver sulfate is 1.5 x 10-2 mol/L.