What does desiccator mean?
noun. an apparatus for drying fruit, milk, etc. Chemistry. an apparatus for absorbing the moisture present in a chemical substance. an airtight, usually glass container containing calcium chloride or some other drying agent for absorbing the moisture of another substance placed in the container.
What is the principle of desiccator?
Constituents. The lower compartment of the desiccator contains lumps of silica gel, freshly calcined quicklime, Drierite or (not as effective) anhydrous calcium chloride to absorb water vapor. The substance needing desiccation is put in the upper compartment, usually on a glazed, perforated ceramic plate.
What is the importance of desiccator?
Desiccators are important for drying reactants prior to their use in chemical reactions. They are usually sealed air-tight to prevent water vapor from entering, and contain a desiccant in order to absorb any water vapor that does enter the chamber.
What are desiccants give example?
Desiccants are drying agents that extract water from a wide range of materials. They are either soluble or insoluble substances that adsorb water due to their chemical properties. Examples include silica gel, bauxite, calcium sulfate and montmorillonite clay.
What are the types of desiccator?
The four basic types of desiccators are standard, automatic, gas purge and vacuum.
How do you handle a desiccator?
To open – slide lid horizontally across the top to one side until it comes off. Use one hand to hold the bottom of the desiccator while using the other hand to grasp the knob. To close – place lid partly on the top and slide across until desiccator is completely closed and then rotate lid gently in both directions.
What is another name for desiccant?
In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for desiccant, like: drying-agent, drier, siccative, sorbent, adsorbent, adsorber and scrubber.
Which is the best example of desiccant?
Silica gel
The correct answer is Silica gel. Silica gel is the best example of a desiccant.
What are the common desiccants?
Some of the most common desiccants include:
- Silica gel (typically found in small “bead” form)
- Activated charcoal.
- Calcium chloride.
- Charcoal sulfate.
- Activated alumina.
- Montmorillonite clay.
- Molecular sieve.
What are the parts of desiccator?
The desiccator contains a plate with holes over a screen which covers granulated anhydrous calcium sulfate, a desiccating or dehydrating agent. The desiccator ought not to be left open except to transfer samples in or out of it. The holes may be used to store samples in a dry environment.
What do desiccants do?
Desiccants are commonly used to keep products dry and stable. Dry desiccants can absorb moisture from air either by physical adsorption or by chemical reaction, and thus reduce the humidity in the headspace of sealed containers.
What is the opposite of a desiccant?
A desiccant is a hygroscopic substance that is used to induce or sustain a state of dryness (desiccation) in its vicinity; it is the opposite of a humectant.
What is desiccant made of?
Silica gel is a granular, vitreous, porous form of silicon dioxide made synthetically from sodium silicate. Used as a desiccant, it works by a process called adsorption. The water in the air actually absorbs between the tiny passages as the air passes through them.
What is a good desiccant?
Clay is a good basic desiccant that works satisfactorily below 120°F (approximately 50°C). Above 120° F, there is a possibility that the clay will give up moisture rather than pulling it in, so anticipated storage and transportation conditions should be considered.
What does crucible mean in the Bible?
A crucible is a severe test or trial or an extremely challenging experience. This figurative sense of crucible is based on the literal meaning of the word: a heat-resistant container used to melt metals.
What are three reasons Arthur Miller wrote The Crucible?
During the tense era of McCarthyism, celebrated playwright Arthur Miller was inspired to write a drama reflecting the mass cultural and political hysteria produced when the U.S. government sought to suppress Communism and radical leftist activity in America.
What is the meaning of desiccator?
1 : a container (as a glass jar) fitted with an airtight cover and containing at the bottom a desiccating agent (as calcium chloride) 2 : a machine or apparatus for desiccating food usually by the aid of heat and sometimes in a vacuum.
What is a desiccant used for in desiccators?
A desiccant, or drying material, is usually added to the desiccator to absorb water vapor whenever the desiccator is opened. Calcium chloride (a salt) and silica gel (a non-reactive solid) are two typical desiccants that are used routinely.
What is the residue of a desiccated plant?
The residue was a tar which, on standing in a desiccator for some time, became dry enough to break into sticky lumps. They were kept a day or two in a desiccator over sulphuric acid, but did not become completely dry. What Do “a.m.”
What happens when a desiccator is opened?
The contents of desiccators are exposed to atmospheric moisture whenever the desiccators are opened. It also requires some time to achieve a low humidity.