$3.00 chem lab questions (equilibrium constant)
- From Chemistry: General-Chemistry
- Closed, but you can still post tutorials
- Due on Nov. 04, 2009
- Asked on Nov 03, 2009 at 5:46:50PM
Q:1. The many colors of autumn leaves, the shades of colors in fingernail polishes and facial makeup, and the colors of paints and dyes... all colors appear in the visible part of the electromagnetic spectrum. Explain the mechanism by which molecules for each of these examples produce the unique colors that our eyes detect.
2. why do blue jeans appear blue?
3.the white light from a lamp of a spectrophotometer passes through a slit and focusing lens before reflecting off a diffraction grating. The diffraction grating acts much like a prism seperating the white light into a rainbow of colors. in this experiment the wavelengh control of the spectrophotometer is set to maximize the absorption of 447 nm EM radiation for FeNCS2+ in the sample cell.
what is the color of 447 nm EM radiation? what is the color of the FeNCS2+ sample in the experiment? why do the colors not agree?
4. when white light is passed through a colored solution, EM radiation is absorbed and EM radiation is transmitted.
what is the quantitative relationship between absorbed and transmitted EM radiation?
write the equation that relates absorbed EM radiation to the concentration of the absorbing species in solution.
