Question

Table 1: Red 40 Dye Solution [Red 40), M 0.1000 0.0800 0.0500 0.0200 0.0000 Absorbance, AU 0.348 0.295 0.147 0.075 0 Blank Analytical A, nm: Unknown No: Unknown Abs: Slope of B-L Plot: Int'pt of Plot: [Red 40) in unk: 501.9 B-74 0.792 3.529 -0.00347

PLEASE HELP!

1.  Solve for concentration (x) using your best fit line from the graph (y=mx+b)

2. What is the concentration of your unknown solution in mM?

3. What is the molar absorptivity (ϵ) of the drink mix? (In units of mM^-1 cm^-1)

Answer 1

y=3.588x-0.008 R=0.979 ó 0.02 0.04 0.06 0.08 om 0.12

s. The equation of bust fit line is : y = 3.588 -0.008 .... (1) for unknown; y = 0.792 i, a: 0.792 +0.008 (M): 0.223 (H) 3.588 slope d The of line = molar absorprivity = rea 35 88 mm'cm! 2.