Is Dissolving Endothermic Or Exothermic

11.1 The Dissolution Process

By the end of this section, you lot will be able to: Describe the basic properties of solutions and how they form Predict whether a given mixture will yield a solution based on molecular backdrop of its components Explicate why some solutions either produce or absorb heat when they form An earlier affiliate of this text introduced solutions, divers as homogeneous mixtures of two or more than substances. Often, ane component of a solution is present at a significantly greater concentration, in which instance information technology is chosen the solvent. The other components of the solution present in relatively lesser concentrations are called solutes. Sugar is a covalent solid equanimous of sucrose molecules, C12H22O11. When this chemical compound dissolves in water, its molecules become uniformly distributed among the molecules of water: The subscript aq in the equation signifies that the sucrose molecules are solutes and are therefore individually dispersed throughout the aqueous solution (water is the solvent). Although sucrose molecules are heavier than water molecules, they remain dispersed throughout the solution; gravity does not cause them to settle out over time. Potassium dichromate, K2Cr2O7, is an ionic compound composed of colorless potassium ions, K+, and orangish dichromate ions, . When a small corporeality of solid potassium dichromate is added to water, the chemical compound dissolves and dissociates to yield potassium ions and dichromate ions uniformly distributed throughout the mixture ( Figure one ), every bit indicated in this equation: As for the mixture of carbohydrate and h2o, this mixture is too an aqueous solution. Its solutes, potassium and dichromate ions, remain individually dispersed amongst the solvent (water) molecules. Figure 1. When potassium dichromate (K2Cr2O7) is mixed with water, it forms a homogeneous orang Continue reading >>