Question

My experimental mass of Kool-Aid is 0.3110 g in 100 mL.

Kool-aid contains Tartrazine dye and another unkown dye content.

The concentration of tartrazine stock i use is 1.831 x 10^-4 M.

By plotting a graph which Absorbance( wavelength is 425 nm) against Concentration of Tartrazine.

I use 0.00, 2.00, 4.00, 6.00, 8.00 volume of Tartrazine stock and diluted into 50 mL.

The abosrbance of Kool-Aid at 425 nm is 0.556 .

I get an equation y=27253x-0.0048

How to calculate the mass% of tartrazine dye in the Kool-Aid ?

The given Tartrazine MM= 534.3 g/mole