Data Collection Part I: Standard Solution Mass of copper wire, 8: 6. 6.5919 63.54 Moles of copper in the solution: 1.09x

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Data Collection Part I Standard Solution Mass Of Copper Wire 8 6 6 5919 63 54 Moles Of Copper In The Solution 1 09x 1 (33.8 KiB) Viewed 39 times

Data Collection Part I Standard Solution Mass Of Copper Wire 8 6 6 5919 63 54 Moles Of Copper In The Solution 1 09x 2 (34.76 KiB) Viewed 39 times

Data Collection Part I Standard Solution Mass Of Copper Wire 8 6 6 5919 63 54 Moles Of Copper In The Solution 1 09x 3 (23.69 KiB) Viewed 39 times

Data Collection Part I: Standard Solution Mass of copper wire, 8: 6. 6.5919 63.54 Moles of copper in the solution: 1.09x102 mol T: 04 ...5 table to Molarity of copper in the solution: 0-22.M % Transmittance of copper solution at 620 mm: Absorbance of copper solution at 620 nm: 41.6% 0.381 Part II: Brass Solution / Mass of brass sample, g: 155.5% % Transmittance of brass solution at 620 nm: Absorbance of brass solution at 620 nm: 0.256 Part II: Brass Solution 2 0.865g Mass of brass sample, g: 90 dans son % Transmittance of brass solution at 620 mm: 49.07. Absorbance of brass solution at 620 nm: 0.309 Copper in Brass - 5
Calculations 1. Use Beer's Law and your data from your standard solution in Part I to calculate the value of molar absorptivity, t. Include units in your answer. 2. Use Beer's Law and the molar absorptivity of copper calculated in Part I with the absorbance data from Part II to calculate the concentration of copper in Brass Solution I 3. Calculate the number of grams of copper in Brass Solution I. 4. Calculate the mass percent of copper in the Brass Solution 1 (grams of copper divided by grams of brass x 100%). 5. Use Beer's Law and the molar absorptivity of copper calculated in Part I with the absorbance data from Part II to calculate the concentration of copper in Brass Solution II
6. Calculate the number of grams of copper in Brass Solution II 7. Calculate the mass percent of copper in the Brass Solution 11 (grams of copper divided by grams of brass x 100%) 8. Calculate the average mass percent of copper in the brass. 9. Give two reasons the two determinations of mass percent may not have given the same result.