culations. Report all values to s ghent rigures. the 3 stan the absorptivity (a)

Question

culations. Report all values to s ghent rigures. the 3 stan the absorptivity (a) using A = abc and the molar absorptivity (c) using A = cbc foreach of standards were made correctly, all the values for "a" will be values for will be the same. Experimentally, the in the table of below. Record the molar absorptivity in scientific notation. If the the same, and all the y should be very close Molar Absorptivity (E) Standard #1 Standard #2 mg/L -Lena Standard #3 Average: 2. A tote i the blue liquid in the tote. Using and abc, calculate the concentration inmg/L for blue dye #1 in the tote. Calculate how sa common industrial container for liquids. A tote holds 330 gallons. Blue dye #1 was added n the tote to obtained a specific intensity of blue. An absorbance of 0.575 was found for the average absorptivity value for blue dye #1 in the table above many grams of blue dye #1 are in the 330 gallons for the tote. Show your work for the calculations

Explanation / Answer

2. Absorption (A) = ebc

with,

e = molar absorptivity of blue dye #1

b = path length

c = concentration

From the literature,

molar absorptivity of blue dye #1 we are taking as 80,000 M-1.cm-1

[pl. note If you change molar absorptivity value the other calculations would also change accordingly]

Path length here would be 1 cm

Given absorbance = 0.575

Therefore,

concentration (c) = A/eb

feeding the values we get,

concentration of blue dye in solution = 0.575/80,000 = 7.19 x 10^-6 M

concentration of blue dye in mg = 7.19 x 10^-6 M x 792.85 g/mol x 1000 = 5.7 mg/L

1 gallon = 3.785 L

So, 330 gallon = 1249.05 L

So for 330 gallon the total blue dye#1 in solution = 1249.05 L x 5.7 mg/L/1000 = 7.12 g

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