A desiccator is one airtight container i m sorry maintains an setting of low humidity with the usage of a perfect drying agent which rectal the bottom part of the desiccator. The is supplied both for the cooling of boil objects and also for the warehouse of dry objects that need to not it is in exposed come the moisture normally present in the atmosphere.

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The desiccator you will be using is made of aluminum. The desiccant we will certainly be using is anhydrous CaCl2. One airtight seal is maintained by applying silicone grease come the surfaces wherein the lid and also body of the desiccator meet. Be careful not to include too much grease. As soon as the desiccant has been added, the lid come the desiccator must not be removed any more than is necessary.

An ignited crucible or other very hot object need to be cooled for about one minute prior to being inserted into the desiccator. In either case, the lid the the desiccator should be slightly ajar for 30 seconds prior to finish closing. This will avoid a partial vacuum from forming as the heated wait cools. If such a vacuum develops it might end up being very an overwhelming to eliminate the lid there is no upsetting the samples within.

A dried sample should remain in the desiccator because that at the very least 5 minutes before being weighed. If the sample is to stay in the desiccator for an extended duration of time before weighing, the optimal of the weighing party of the lid that the vial need to be placed in location after 10 minutes of cooling.


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Several experiment will require some ability in making use of a desiccator. To open the desiccator, on slide the lid tenderness as shown at left. If you feeling or hear metal scraping against metal as soon as you slide off the lid, then a tiny amount the silicon grease needs to it is in rubbed roughly the flat surface that the lid. To express a VERY small amount the grease onto her finger, as at the right,

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and rub it all around the flat surface that the lid.

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The desiccator includes a plate through holes over a display which consists granulated anhydrous calcium sulfate, a desiccating or dehydrating agent. The desiccator ought no to it is in left open except to deliver samples in or out of it.

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useholes.jpgwhy is it best to cool the crucible and lid in a desiccator