Homework Help: Honors Chemistry

Posted by Anonymous on Monday, October 16, 2006 at 7:10pm.

At what wavelengths do Cr(III) ions absorb the maximum amounts of light?

Look at your color wheel. What color is Cr(III)? It will absorb the complement of its color. You may have a graph of absorbance vs wavelength for Cr(III). If so, the maximum absorbance (in th visible region) is the wavelength you seek. It may have more than one peak but the one you want is the one in the visible.

But I don't have a graph of absorbance vs. wavelength for Cr(III), only for percent transmittance vs. wavelength for Cr(III). And I don't have a color wheel containing Cr(III). Please help me!

I need help balancing chemical equasions. For some reason I just cant do it.

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