A solution in part C initially contains (4.1000x10^-4) molar SCN¯ and (1.180x10^-1) molar Fe3+. This solution was then measured using the colorimeter, and an absorbance of (5.150x10^-1) was recorded.The constant determined in part A of the experiment was found to be (3.47x10^3). Using the absorbance and constant provided, determine the equilibrium concentration of FESCN2+, [FESCN2+]e. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer:
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- Please complete Table 2 and show the calculations for protein concentration and the concentration of the undiluted sample. a). Using Excel software, enter data from Table 1 to plot a standard curve (corrected average absorbance on Y-axis and protein concentrations on X-axis). The standard curve must contain correct labels on both axes. b). From the standard curve, obtain a best fit line and equation. c). Use the best fit equation and data from Table 2 to find the concentrations of proteins in sample A2-D2 and E1. [onto your plotted standard curve, indicate where A595 of A2-D2 and E1 are located] d). Calculate the concentrations of proteins in undiluted samples A to E. Thank you very much.The absorbance of a 0.00105% m/v solution of tolbutamide in methanol when measured in a 1 cm path length cell was found to be 0.796 at 228 nm. Calculate the specific absorbance.A student prepared a calibration curve by measuring of the absorbance of five standard solutions of a compound at 300 nm. A cuvette with a path length of 5 cm was used . if the slope of the curve was 300 L/mol. the molar absorptivity of the compound is…….. 60 L mol-1cm-1 1500 L mol-1cm-1 0.20 L mol-1cm-1 5.0 L mol-1cm-1
- Atomic absorption spectroscopy with graphite furnace atomization is an extremely sensitive technique. The standard addition method is used with this technique to determine the concentration of copper in urine. A 20.00 mL sample of urine is spiked with 1.00 mL of 300. ppb Cu²+ and this mixture gives a response of 0.168. Another 1.00 mL aliquot of 300. ppb Cu²+ is added to this mixture and gives a reading of 0.235Determine the concentration of copper in the urine sampleThe determination of iron in wines was carried out by atomic absorption spectrophotometry, using the standard addition method. To do this, 10 mL of wine were placed in five 50 mL volumetric flasks; then 0, 5, 10, 15 and 20 mL of a 10 ppm iron standard solution were added to each of them. Next, they were gauged with distilled water and the absorbance was measured, obtaining the values of 0.040, 0.062, 0.081, 0.102 and 0.125 respectively. Calculate the regression parameters and obtain the iron concentration in the wine, in µg / mL.In an experiment you measure a solution absorbance of .2 with a path length of 1cm. If the molar absorptivity coefficient is 59cm-1 M-1 what is the concentration in molarity.