1. Calculate the molarity of the metal ion in each solutiondescribed below. A) 5

Question

1. Calculate the molarity of the metal ion in each solutiondescribed below. A) 5.00mL of 0.400M CuSO4 is added to 15.0mLH2O B) 10.00mL of 0.200 M AgNO3 is added to 10.0mLH2O 2. What is a Beer's law graph? Should the line be drawnthrough the point (0,0)? Explain. 1. Calculate the molarity of the metal ion in each solutiondescribed below. A) 5.00mL of 0.400M CuSO4 is added to 15.0mLH2O B) 10.00mL of 0.200 M AgNO3 is added to 10.0mLH2O 2. What is a Beer's law graph? Should the line be drawnthrough the point (0,0)? Explain.

Explanation / Answer

A) 5 mL *0.4 M / (5 + 15 mL) = 0.1 M B) 10 mL *(0.2 M) / (10 + 10 mL) = 0.1 M 2) Absorbace versus concentration, A = eps*b*c, eps = molar extinction coefficient (specific to species) b = path length of cell (distance light travels through sample) c = concentration Theoretically, A = 0 when c = 0. So it should be at origin.However,you might get background absorbance (from the cell or solvent)

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