Question

The concentration of a metal complex was determined by the Beer-Lambert Law A=c\times ϵ\times l with the following values: c = 0.428 mol/L A = 68.48 \pm 0.84 (no units) (given as 95% confidence interval; k = 2) \epsi = 160\pm 15 M-1cm-1 (given as 95% confidence interval; k = 2) l = 1.0000 \pm 0.0010 cm (uniform distribution, a = 0.0010) First, Calculate the relative uncertainty of each value: Parameter? Relative Error A 0.0061 \epsi 0.047 l 5.8E-4 Using the relative uncertainties above, calculate the expanded uncertainty (U) in the concentration of the metal complex:

          The concentration of a metal complex was determined by the Beer-Lambert Law A=c\times ϵ\times l
 with the following values:
c = 0.428 mol/L
A = 68.48 \pm  0.84 (no units)       (given as 95% confidence interval; k = 2)
\epsi  = 160\pm 15 M-1cm-1          (given as 95% confidence interval; k = 2)
l = 1.0000 \pm  0.0010 cm           (uniform distribution, a = 0.0010)
First, Calculate the relative uncertainty of each value:
Parameter? Relative Error
A 
0.0061
\epsi  
0.047
l 
5.8E-4
Using the relative uncertainties above, calculate the expanded uncertainty (U) in the concentration of the metal complex:

Added by Jennifer B.

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