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
To clean the inside of a coffee percolator, empty the machine, fill the reservoir with a mixture of distilled water and white vinegar, run the cycle on the machine, run a few more cycles with only water, and wash the filter and carafe. Cleaning a coffee maker takes about an hour and requires distilled water and white vinegar.Full Answer >
A piece of pH indicator paper is used to gauge the acidity or alkalinity of a solution. Different types of pH indicator paper are used depending on the type of test and level of accuracy required, such as red or blue litmus paper.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 >
Make crystals by dissolving borax in boiling water, adding food coloring and dipping a pipe cleaner in the solution. You need a pot, a jar, a pipe cleaner, borax, food coloring scissors, string and a pencil.Full Answer >