[Xuanny]

I know the graph isn't linear at high concentrations, but how high should they be? In class, we did a lab where various solutions were tested. They were 0.2, 0.4, 0.6, 0.8, and 1.0 molar. It makes this curvy thing (sorry I can't be more technical) instead of a line. (0,0) and the first two points might make a line... Is this because the concentration was too high or because we did the lab wrong? Its probably more likely we messed up, and 1.0 molar doesn't seem high, but I'm still hopeful.   Also, the light had a wavelength of 635 nm, but the solution was very blue (not purplish). Could that be the reason?