A solution of concentration #5# x #10^-5# #M# has absorbance of #0.75# in a cell of #1# #cm# length. Calculate molar absorptivity and transmittance of the cell?

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Answer 1 · 2016-02-14T17:49:12

#(a)#

#1.5xx10^(4)"L/mol/cm"#.

#(b)#

#17.8%#

#(a)#

The Beer - Lambert Law gives us:

#A=epsilon_(@)cl#

#:.epsilon_(@)=(A)/(cl)#

#:.epsilon_(@)=(0.75)/(5xx10^(-5)xx1)#

#epsilon_(@)=1.5xx10^(4)"L/mol/cm"#

#(b)#

#log(I_0/I)=0.75#

Since #I_0=100rArr#

#2-logI=0.75#

#I=17.8%# which is the transmittance.