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13 Dec 2019

I am doing a lab using a spectrophotometer. I am measuring lambda max. Why does my book say to get the concentration low enough where absorbance is about 1 and transmittance is about .1?

How does concentration of a solution affect absorbance and transmittance?

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Related questions

I am having a difficult time figuring out how to do the equations.


I need help with problem 3 in particular.

Fe^3+(aq) + SCN^-(aq) -> FeSCN^2+(aq)

k= [FeSCN^2-]/[Fe^3+][SCN^-]

y= 4454.5x + .0106

R^2=.9827

abs= m[FeSCN^2+] + b

m1v1=m2v2
(.00200)(1.0)=m2(50)
m2 = 4.0x10^-5

Fe3+(aq) +SCN-(aq) -> FeSCN2+(aq)
k=[FeSCN2+]/[Fe3+][SCN-]
abs=m[FeSCN2+] + b
m1v1=m2v2
(.00200)(1.0)=m2(50.0)
m2=4.0x10^-5
y=4454.Rx + .0106
R2= .9827

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