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24forChromium
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I need the molar absorptivity data of chromate and dichromate ions at various wavelengths, can anyone suggest a database or something like that?
Sadtler.24forChromium said:a database
can you send me a link?Bystander said:Sadtler.
All of these seem to be proctected and almost none have anything to do with chromate ionBystander said:
24forChromium said:I need the molar absorptivity data of chromate and dichromate ions at various wavelengths, can anyone suggest a database or something like that?
Molar absorptivity is a measure of how strongly a substance absorbs light at a specific wavelength. It is important for chromate and dichromate ions because it allows us to quantify the amount of light absorbed by these ions, which can help us determine their concentration in a solution.
The most reliable source for molar absorptivity data is scientific journals and databases. Some examples include the National Institute of Standards and Technology (NIST) database and the Handbook of Chemistry and Physics. These sources provide peer-reviewed and accurate data for chromate and dichromate ions.
The molar absorptivity of chromate and dichromate ions varies with wavelength, with a peak absorption usually occurring at around 350-360 nm. This is due to the electronic transitions of these ions, which absorb light at specific wavelengths.
Yes, you can calculate the molar absorptivity of chromate and dichromate ions using the Beer-Lambert Law, which relates the concentration of a substance to its absorbance. However, this requires accurate experimental data and a good understanding of the principles of spectrophotometry.
The molar absorptivity of chromate and dichromate ions is highly dependent on pH. At lower pH levels, the molar absorptivity decreases due to the formation of protonated species. At higher pH levels, the molar absorptivity increases due to the formation of hydroxide species. This is important to consider when measuring the concentration of these ions in a solution with varying pH.