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What color is selenium?
Selenium is a non-metal element, so it does not have a distinct color in its pure form. However, when combined with other elements in compounds, selenium can exhibit colors ranging from red to black, depending on the specific compound.
What is the color of the salicylic acid-Fe3 complex?
When this salicylate dianion is mixed with an acidic solution of FeCl3(aq), iron(III) chloride, a highly colored (VIOLET) iron (III)-salicylate complex is produced. The maximum absorption of the complex is at about 535 nm.
Why does ferric nitrate gives yellow color when react with salicylic acid?
Ferric nitrate gives a yellow color when reacting with salicylic acid due to the formation of a complex between the iron ions (Fe³⁺) and the hydroxyl groups of salicylic acid. This complexation results in a charge transfer that produces a yellow-colored species. The intense color is indicative of the presence of the iron-salicylate complex, which is a characteristic behavior of phenolic compounds interacting with transition metal ions.
What causes a green line in the spectrum of selenium?
A green line in the spectrum of selenium is typically caused by electrons transitioning to lower energy levels within selenium atoms, emitting photons in the green region of the spectrum. This phenomenon is known as spectral emission, where specific wavelengths of light are produced as a result of electron transitions.
How was selenium used in the past?
In the past, selenium was mainly used in the production of glass to remove color caused by impurities and to make glass more transparent. It was also employed in photographic paper to increase sensitivity to light. Additionally, selenium was used in early electronics as a rectifying agent in devices like rectifiers and photovoltaic cells.
What is the color of silver sulfide?
Silver sulfide is typically black or gray in color.
What is the rationale for the color reaction between salicylic acid and ferric chloride?
The color reaction between salicylic acid and ferric chloride is based on the formation of a complex between salicylic acid and ferric ion. The complex absorbs light in the visible range, resulting in a color change from pale yellow to purple or blue depending on the concentration of salicylic acid. This reaction is commonly used in analytical chemistry for qualitative detection of phenols.
What is the color of CuS?
Copper sulfide (CuS) is black in color.
Why do photographers work with selenium?
Selenium toning preserves black & white images without changing their color.
What color flame test does selenium nitrate give?
Selenium nitrate typically gives a pink or reddish flame color when subjected to a flame test.
What is the colour of iron sulphur?
Iron(II) sulfide is a dark green to black color. Iron(III) sulfide is a brownish black color.
What color is selenium?
Selenium is a non-metal element, so it does not have a distinct color in its pure form. However, when combined with other elements in compounds, selenium can exhibit colors ranging from red to black, depending on the specific compound.
What is the color of Ag2s?
The color of Ag2S (silver sulfide) is typically black or dark grey.
What is the color of the salicylic acid-Fe3 complex?
When this salicylate dianion is mixed with an acidic solution of FeCl3(aq), iron(III) chloride, a highly colored (VIOLET) iron (III)-salicylate complex is produced. The maximum absorption of the complex is at about 535 nm.
What would be seen if you analyze salicylic acid in FeCl3 test?
If salicylic acid is tested with FeCl3, a violet color will be observed indicative of the presence of phenols in the compound. This test is commonly used to identify the presence of phenolic functional groups in organic compounds.
Is lead sulfide a solid?
Yes, lead sulfide is a solid compound at room temperature and pressure. It is insoluble in water and has a dark gray color.
What is the color of ferrous sulphide?
Ferrous sulfide is typically a black or dark grey color.
