100ml total solution mass of fruit loops 1.17g wavelenght used to analyze extrac

Question

100ml total solution

mass of fruit loops 1.17g

wavelenght used to analyze extract solution is 482.6nm

absorbance at Amax is .164

need the concentration of the dye in the extract solution

need the mass of the dye in the sample

need the percent by mass of dye

Determining the percent by mass of food dye in Fruit Loops Color of Fruit Loops analyzed:___ Mass of Fruit Loops sample analyzed:___ Wavelength used to analyze extract solution:___ Absorbance at lambda_max for extract solution: ___ Concentration of dye in the extract solution:___ Mass of dye in the Fruit Loops sample:___ Percent by mass of dye in Fruit Loops cereal___

Explanation / Answer

Plot absorbance vs concentration, Molar absorptivity() can be determined from the slope of this straight line.
A = lc, then using this formula we can find the concentration of the dye in the extract solution. [l = 1cm]
Multiply this concentration with total volume of the solution to get moles of the dye
From the observation of the color of the fruit loops you can determine the compound name and its
chemical formula, hence molar mass of the dye will be known.
Now moles of the dye * gm / mol of dye = mass of the dye in sample
percent by mass of dye = (mass of the dye in sample / mass of fruit loops)*100

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