Dissolution is the dissociation or intermolecular occupation of a solute species in a solvent species to form a solution. A common dissolution process is the introduction of table salt crystals to water to form a saline water solution.
A general rule of dissolution is that "like dissolves like." Substances must possess similar intermolecular forces for them to be able to dissolve in one another. Introducing a solute to a solvent must involve some interaction between the two species for a solution to form.
For a solid solute dissolving in a liquid solvent, the interactions between the molecules of the solute and the solvent must be stronger than the interactions in between the solvent molecules. The stronger these interactions are, the faster the solute dissolves in the solvent and the larger the amount of solute that the same amount of solvent is able to dissolve.
An example is the dissolution of strongly ionic salts in polar solvents, such as water. Water molecules are able to separate the solute molecules into individual ions and surround them to form a solution. This mechanism of surrounding the solute molecules with solvent molecules is called solvation and must occur regardless of the phases involved for a solution to form.Learn More
Water temperature affects the rate at which sugar dissolves. Sugar dissolves faster in warmer water than it does in cooler water. Two things are required for a substance to dissolve and create a solution: the substance itself, or the solute, and the substance it is dissolving into, or the solvent.Full Answer >
Sugar dissolving in water is a physical change and not a chemical one. Chemical changes only occur when new substances form. Dissolving sugar in water does not cause a chemical reaction to take place.Full Answer >
Iodine solution is made by mixing iodine into a mixture of potassium iodide; this mixture is commonly used to check for starch. Iodine solution is also known as povidone and is used to kill bacteria and treat infections and mild cuts.Full Answer >
Nickel acetate is used as a mordant in the textile industry, a solution for electroplating nickel, a catalyst for hydrogenation and a sealer for anodized aluminum. Nickel acetate serves as an intermediate chemical for other nickel compounds. The hazardous chemical forms green crystals as a solid salt, and nickel acetate smells like acetic acid when vaporized.Full Answer >