Silver sulfide represented by the chemistry formula Ag2S <1> is a black color crystalline powder the is dissolve in nitric acid, sulfuric acid and alkali cyanide solutions. Ag2S is insoluble in alcohol <1, 5>. It occurs in nature as the mineral argentite and is one ionic compound <5, 6>. That is really stable and also doesn’t decompose easily except at very high temperature or by the electrolysis the the molten link <11>.
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Silver Sulfide Identification
|CAS Number||21548-73-2 <1>|
|PubChem CID||30686 <2>|
|ChemSpider ID||145878 <3>|
|EC Number||244-438-2 <1>|
Composition and Synthesis
Silver sulfide deserve to be all set by a reaction between silver and also gaseous hydrogen sulfide. Hydrogen gas is released in the process.
2Ag + H2S = Ag2S + H2
Our silverware tarnishes since of the above reaction. Air has traces the hydrogen sulfide which causes the silver- to tarnish creating silver sulfide. You have the right to polish her silver utensils clean by rubbing them through a cloth and also polishing compound <7> It can be represented by the below reaction with aluminum that requires the reduction of silver- sulfide to silver <13>.
3Ag2S + 2Al = 6Ag + Al2S3
Silver Sulfide Formula
Properties and Characteristics of silver- Sulfide
|Molar mass/molecular weight||248.804 g/mol <2>|
|Color/appearance||Black flour <1>|
|Melting point/freezing point||845°C, 1553°F <1>|
|Boiling point||N/A <1>|
|Density||7.234 g cm-3 <1>|
|State of issue at room temperature (normal phase)||Solid <1>|
|Resistivity||0.1 – 10 ohm-m <14>|
|Solubility in water||Insoluble <5>|
|Crystal structure||Orthogonal <4>|
|Band void of nanoparticles||0.96 eV <10>|
Silver Sulfide Structure
Silver sulfide reacts through hydrochloric acid to produce silver chloride and hydrogen sulfide <9>.
Ag2S + 2HCl = 2AgCl + H2S
It reacts v nitric acid to type silver sulfate, nitric oxide and also water <8>.
3Ag2S + 8HNO3 = 3Ag2SO4 + 8NO + 4H2O
Silver Sulfide UsesThe link finds application in anti-microbial and anti-bacterial agents <4>.As a photosensitizer in photography <4>.As a rap reagent <4>.Inlaying in niello metalwork and also ceramics <5>.
Is that Dangerous
The compound is irritating to the eyes, skin and also respiratory system. Hence contact and also inhalation have to be avoided <4>. Sloop down is harmful together it may cause health dangers like irreversible pigmentation throughout metabolism <12>.
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Silver Sulfide (Ag2S) Price
5 gram that the compound costs around $80 <8>.
2 responses come “Silver Sulfide”
November 12, 2020 in ~ 4:41 am
Ag2S + 2HCl = 2AgCl + H2S
How deserve to this reaction take it place despite silver being much less reactive 보다 hydrogen in the reactivity series?
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Limiting Reagent (Reactant)
Autoionization (Self-ionization) of Water
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