A Dubosq colorimeter consists of a cell of fixed path length and a cell of variable path
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A Dubosq colorimeter consists of a cell of fixed path length and a cell of variable path length. By adjusting the length of the latter until the transmission through the two cells is the same, the concentration of the second solution can be inferred from that of the former. Suppose that a plant dye of concentration 25µg dm−3 is added to the fixed cell, the length of which is 1.55 cm. Then a solution of the same dye, but of unknown concentration, is added to the second cell. It is found that the same transmittance is obtained when the length of the second cell is adjusted to 1.18 cm. What is the concentration of the second solution?
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Related Book For 
Physical Chemistry Thermodynamics And Kinetics
ISBN: 9781464124518
10th Edition
Authors: Peter Atkins, Julio De Paula
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