Which of the following is known as calomel?
Which of the following is known as calomel?
Mercury chloride
Which of the following is known as calomel? Explanation: Mercury chloride is known as calomel.
What does calomel look like?
Calomel is a mercury chloride mineral with formula Hg2Cl2 (see mercury(I) chloride). The name derives from Greek kalos (beautiful) and melas (black) because it turns black on reaction with ammonia. This was known to alchemists….
| Calomel | |
|---|---|
| Color | Colorless, white, grayish, yellowish white, yellowish grey to ash-grey, brown |
What was calomel used for?
Calomel, or mercurous chloride, probably originated inChina and was used by Paracelsian physicians in the 16th century. It was used to treat malaria and yellow fever, and a preparation called “wormchocolate” or “worm candy” was given to patients infested with helminths.
How is calomel formed?
calomel (Hg2Cl2), also called mercurous chloride or mercury(I) chloride, a very heavy, soft, white, odourless, and tasteless halide mineral formed by the alteration of other mercury minerals, such as cinnabar or amalgams.
Is calomel still used?
Once the most popular of cathartics, calomel has been used in medicine since the 16th century. The recognition of its potential toxicity (because of disassociation into mercury and mercuric chloride), together with the development of superior and safer cathartics, led to a decline in its use in internal medicine.
What is SCE in chemistry?
A saturated calomel electrode (SCE) is a reference electrode based on the reaction between elemental mercury and mercury (I) chloride. The electrode is normally linked via a porous frit to the solution in which the other electrode is immersed. This porous frit is a salt bridge.
What part of speech is calomel?
noun
noun Pharmacology. a white, tasteless powder, Hg2Cl2, used chiefly as a purgative and fungicide.
Is calomel still used today?
What is SCE in electrochemistry?
A saturated calomel electrode (SCE) is a reference electrode based on the reaction between elemental mercury and mercury (I) chloride. The SCE is used in pH measurement, cyclic voltammetry and general aqueous electrochemistry.
Which chemical is present in calomel electrode?
A saturated water solution of KCl (potassium chloride) is in contact with the mercury and the mercury(I) chloride (also known as “calomel”). Linking the electrode to the solution in which the other electrode is immersed is a porous frit, which is a salt bridge.
What is meant by calomel in saturated calomel electrode?
The aqueous phase in contact with the mercury and the mercury(I) chloride (Hg2Cl2, “calomel”) is a saturated solution of potassium chloride in water. The electrode is normally linked via a porous frit to the solution in which the other electrode is immersed. This porous frit is a salt bridge.
What is the chemical formula for calomel?
Calomel is a mercury chloride mineral with formula Hg2Cl2 (see mercury(I) chloride).
Can calomel be absorbed through the small intestine?
Mercury salts (such as calomel) are insoluble in water and therefore do not absorb well through the wall of the small intestine. Some of the calomel in the digestive system will likely be oxidized into a form of mercury that can be absorbed through the intestine, but most of it will not.
What is a heroic dose of calomel?
Although during the 18th and early 19th century pharmacists used calomel sparingly, by the late 1840s calomel was being prescribed in heroic doses. This was, in part, due to the research of Benjamin Rush who coined the term heroic dose to mean about 20 grains taken four times daily.
What is the function of calomel in electrochemistry?
Electrochemistry. Calomel is used as the interface between metallic mercury and a chloride solution in a saturated calomel electrode, which is used in electrochemistry to measure pH and electrical potentials in solutions, In most electrochemical measurements, it is necessary to keep one of the electrodes in an electrochemical cell…
