Posted by Sammie on Wednesday, May 28, 2008 at 12:08am.
What type of spectrum are you talking about? Reflection from the solid? Intrared transmission? Visible or ultraviolet transmission of aqueous solution? Flame emission spectroscopy? Atomic absorption spectrometry?
What do you mean by "reacted with fire?"
In the flame emission spectroscopy, the color seen with CuSO4 will be blue-green and will be dominated by three blue-green lines of neutral copper, at 511,515 and 522 nm wavelength
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