Calculate the effective absorptivity and molar absoptivity for manganese is a potassium permanganate solution that contains 0.10g of manganese in 100 mL has an absorbance of 0.434 using a 1.5 cm cell at a wavelenght of 550 nm. Molar Mass: Mn=54.94 Answer: Effective absorptivity= 2.89 cm-1 g-1 L ; mOLAR ABSOPTIVITY= 159 cm-1 mol-1L
Give the solutions of the following;
1. Calculate the effective absorptivity and molar absoptivity for manganese is a potassium permanganate solution that contains 0.10g of manganese in 100 mL has an absorbance of 0.434 using a 1.5 cm cell at a wavelenght of 550 nm. Molar Mass: Mn=54.94
Answer: Effective absorptivity= 2.89 cm-1 g-1 L ; mOLAR ABSOPTIVITY= 159 cm-1 mol-1L
2. Manganese is determined colorimentrically as permanganate by measuring the absoprtion of monochromatic green light. A standard solution in an absoption cell 5.00 cm long absorbs 10.0% of the light, while an unknown sample in a cell 1.00 cm long absorbs 50.0% of the light. The standard solution contains 2.00 mg of Mn per liter. What is the concentration (g/L) of the Mn in the unknown?
Ans= 0.0657 g/L
3. The drug tolbutamine (mm=270) has a molar absorptivity of 703 AT 262 nm. One tablet is dissolved in water and diluted to a volume of 2L. If the solution exhibits an absorbance in the UV region at 262 nm equal to 0.678 in a 1-c, cell, how many grams tolbutamine are contained in the tablet? Ansswer: 0.528g
Step by step
Solved in 3 steps
