Solubility is the ability of a substance to dissolve in another substance. It all involves the application of Le Châtelier's Principle. Factors Affecting Solubility (Catalog No. AP4865) provides an inquiry-based activity to investigate the factors that affect the rate at which substances dissolve in solution. > Increasing the pH has the opposite effect. Many sparingly soluble compounds have solubilities that depend on pH. Attractive intermolecular interactions in the gas phase are essentially zero for most substances. • If the solubility of a material is high in a solvent, then its concentration will be high in the solution. The larger the K_(sp) constant, the more soluble is the salt. Bases "Zn(OH)"_2 is a sparingly soluble base. Specifically, this video describes the relationship between the temperature of a solution and the solubility of a solid. When the pressure of a gas is low, the number of gas molecules that hit the surface of the liquid at any given time is low; as a result, there are fewer chances for the gas to dissolve. • Concentration gives the amount of substances in a solution. Solubility and Factors Affecting Solubility. The effect of temperature on solubility can be explained on the basis of Le Chatelier's Principle. The effect of temperature on solubility In general, solids become more soluble as the temperature increases . Example: In 100 g water at 20 0 C, 36 g salt can be dissolved. AP4862) allows students to analyze solubility patterns and to formulate the rules of solubility. 298*K, and 1*atm pressure. When dissolving a gas within a liquid, the pressure of the gas has a huge effect on its solubility. Solubility is the amount of solute in 100 cm 3 (100 mL) solvent.. Thus solubility of salt at 20 0 C 100 g water is 36g/100g. What is the difference between Concentration and Solubility? Precipitation Reactions and Solubility Rules (Catalog No. Decreasing the pH increases the solubility of sparingly soluble bases and basic salts. Once again, students watch a short video (video 2) that introduces factors that affect concentration. When a gas dissolves, it does so because its molecules interact with solvent molecules. According to the Henderson-Hasselbach equation, the relationship between pH, pKa, and relative concentrations of an acid and its salt is as follows: where [A-] is the molar concentration of the salt (dissociated species) and [HA] is the concentration of the undissociated acid. First we need to define what a solvent is. Le Chatelier's Principle states that if a stress (for example, heat, pressure, concentration of one reactant) is applied to an equilibrium, the system will adjust, if possible, to minimize the effect of the stress. This is why sugar dissolves better in hot water than in cold water. If the solvent is a pure compound, you are at the maximum strength and this question becomes redundant. Solubility and Factors Affecting Solubility. Here are two common examples. K_(sp), the "sp" stands for "solubility product", is another equilibrium constant, and measures the solubility of an insoluble or sparingly soluble salt. As with any equilibrium, standard conditions are assumed, i.e. The solubility of gases in liquids decreases with increasing temperature, as shown in Figure \(\PageIndex{2}\). Effect of Temperature on the Solubility of Gases. A solvent is a compound or mixture of compounds in which the solute is dissolved. Solute pKa, Solvent pH, and Solubility. Section 2 - Factors that Affect Concentration. K_(sp) is a MEASURE of solubility. The larger the k_ ( sp ) constant, the pressure of the gas has a huge effect on solubility! Solids become more soluble is the amount of solute in 100 g water at 20 0 C 100 g is! 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