Answer to Question #235481 in Physical Chemistry for gaby

Question

β-carotene is the most important vitamin A. Its molar mass can be
determined by measuring the osmotic pressure generated by a given
mass of β-carotene dissolved in the chloroform solvent. Calculate the molar mass
and β-carotene if 10.0 mL of a solution containing 0.00768 g of β-carotene
it has an osmotic pressure of 0.035 atm at 25 °C. Consider that the constant of
ideal gases R is 0.082057 L.atm/K.mol.

Answer 1

Beta-carotene concentration is measured by spectrophotometric analysis using color absorption levels. Concentration of extraction samples can be measured using absorbance values based on the Hunter a and b colorimetric correlation.