1. 3. The percentage transmittance of an aqueous solution of disodium fumarate at 250 mm and 298 K is 19.2% for a 5 • 10“ molar solution in a 1 cm cell. Calculate the absorbance A and the molar absorption coefficient e. What will be the percentage transmittance of a 1.75 • 10’S molar
   solution in a 10 cm cell?
   [An s. A -  0.717, -  1.43 •  io 3 L mol*1 cmm l , T -  56.1%]

Question 1 Zn(II) and the ligand L form a product that absorbs strongly at 600 nm. As long as the molar concentration of L exceeds that of Zn(II) by a factor of five, the absorbance is dependent only on the cation concentration. Neither Zn(II) nor L absorbs at 600 nm. A solution that is 1.60x104 M in Zn(II and 1.00x10-3 M in L has an absorbance of 0.464 in a 1.00 cm cell at 600 nm. Calculate (a) the percentage transmittance of this solution. (b) the percent transmittance of this solution in a 2.50 cm cell. (c) the molar absorptivity of the complex.