A Soxhlet extractor works by boiling a solution that has a solute of limited solubility in a percolator, then cooling and collecting the condensate in a reservoir from which the concentrated solute can be extracted. A siphon connecting the percolator to the reservoir flushes excess solvent back into the reservoir.Know More
The Soxhlet extractor was invented in 1879 by Franz von Soxhlet to extract lipids from solid materials. The extractor only works when the solute being extracted has limited solubility in the solvent in which it is dissolved. This means that the Soxhlet extractor cannot be used to extract ionic salts from polar solvents such as water, because the solubility limit of such salts in water is extremely high.
The material containing the compound to be extracted is loaded in a thimble and placed inside the percolator. An extraction solvent is added to the material if the material is not already dissolved. The percolator is placed on top of a heating element, and a chilled condenser is placed at the top of the extractor. As the extraction solvent heats up, it dissolves some of the solute. The pressure in the percolator continues to build up until the heated solvent refluxes into a reservoir. The excess solvent is flushed back into the percolator, leaving the solute behind in the reservoir.Learn more about Chem Lab
Supercritical fluid extraction is a process that separates one component from another using supercritical fluids. A supercritical fluid is a substance that is at a pressure and temperature above its critical state.Full Answer >
A confirmatory test is a controlled chemical reaction used to determine the presence of a specific ion or compound in a solution or substance. Confirmatory tests are commonly used after an experiment in a laboratory setting to determine if the reaction proceeded to completion or if the desired products were produced.Full Answer >
Sodium chloride salt crystals can be grown from table salt dissolved in water by allowing the solution to evaporate undisturbed. It is believed that dissolved sea salt or pickling salt, which is pure salt, produces larger crystals while iodized salt appears to promote the growth of smaller crystals. Allowing the evaporation process to go undisturbed is important because any ripples that occur in the solution while it is in the growing container will cause the forming crystals to be smaller.Full Answer >
According to Reference.com, the purpose of titration is to find the concentration of an unknown acid or base in a solution. It works by gradually combining a base of known concentration with an unknown acid solution, or vice versa, until the solution is neutralized.Full Answer >