Molar Absorptivity and Beer's Law
4. A weak organic acid in its dissociated form (A-) absorbs at 375 nm with a molar absorptivity, ε, of 4.48×103 L/(mol?cm). The non-dissociated form of the acid (HA) does not absorb at 375 nm. At 375 nm, a 3.0×10-3 M solution of the acid in water has an absorbance of 0.462 in a 1.00 cm cell. a. What is the concentrat