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April 19, 2014

Homework Help: chemistry

Posted by confused chem. student on Sunday, November 11, 2012 at 7:51pm.

A) Determine the concentration in molarity (M) of a crystal violet solution based on a measured absorbance of 0.545
at 590 nm at a path length of 1.0 cm .
B) Based on your determined concentration (in molarity,M), how many milligrams of crystal violet were dissolved in the
2 mL of water used to prepare the sample for the cuvette?
C) What is the ppm concentration? The molar extinction coefficienet is 87,000 M1cm1 and the
molecular weight is 407.98 g/mol. The density of water is 1.00 g/mL.

PLEASE HELP!!!! :)

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