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- Three compounds (A, B and C) are mixed together ( they are present in the same container). Molar absorptivity coefficients of these compounds at 575nm -1 -1 are: 2500, 3750 and 5250Lcm mol, respectively. Concentrations are: 2 × 10M for A, 5× 105 M for B and -6 1.5×10 M for C. What is the absorbance measured at 575mm, in 1.0cm cuvette of the solution containing all three compounds? Show your calculations.Determine [FeSCN²+] of the unknown in Part B using measured absorbance and the trendline of calibration curve. absorbance(x) is 0.606 trendline is y=5790.0000x+(-0.0180); R2: 0.9978All my data is in the pictures provided. I need help finding the absorbance of each solution, their initial values, and equilibrium constants for both Fe and KSN. Thanks in advance!!
- Ca(QCI)2 + 2 CH3COOH E-> 2HOCI + (CH3COO)2Ca|Vanadium has two isotopes (50V, 0.25%; 51V,99.75%). The EPR spectrum of an aqueous solutionof [VO(OH2)5]2+ shows an 8-line pattern, andg-values of gzz=1.932, gxx = 1.979 and gyy=1.979were determined. What can you deduce from the data?a) CI Ph3PlI. - PPH3 Rh PPH3 + H2 ? Ph3P CO b) Mn2(CO)10 + HCl c) CH3I CO CO CH4 d) Co2(CO)s + H2 CO e) [Fe(CO),(CH;)]* + CH;CH,Br [기 → ? f) H A +PPH3 PPh3 Ph3P g) EtgPl.pt- + LICH3 + PHCH,Br EtgP
- Alizarin (structure shown below) is a red dye used for dyeing textile fabrics. Its extinction coefficient (I is 4895 M'xcm' at a of 430 nm. Calculate the concentration of alizarin in aqueous solution (measured in a cell of pathlength 0.1 cm) if the absorbance value at 430 nm is 0.5. (a) онThe spectrophotometer is used to measure absorbance experimentally. Briefly, explain how this is accomplished.Scott test is one of the methods used for screening for Cocaine in Forensic Chemistry. The multi step method consists of a) reacting the sample drug with cobaltous thiocyanate b) dissolving of the formed precipitate by adding HCl and c) extraction of coordination compound with Chloroform d) measurement of absorbance of extracted coordination compound at 627 nm All the reactions in this multistep method are not fully understood. However, it was determined that there are 2 moles of cocaine in coordination compound measured in last step. If coordination compound is represented as “Scott” coordination compound, which of the following is correct “stoichiometric” factor to get mass of cocaine from mass of measured complex ? a.g (Scott coordination cpd) * MM (Scott coordination cpd) MM (cocaine) b.g (Scott coordination cpd) * 2 *MM (Scott coordination cpd) MM…
- You prepare several dilutions of an unknown compound. You measure the pance of each solution at 340 nm using a 1 cm cuvette (your results are listed in the table- -). What is the extinction coefficient (in (Mecm)') of the compound? (Hint: assume that of the individual values contains some degree of experimental error.) entration(µM) Absorbance at 340 nm 0.011 0.023 0.066 0.119 0.189EKS - Jasmine Bassler - Leam cg//x/isl.exe/1o_u-lgNslkr7j8P3jH-lvUrTNdLZh5A8CnG03PBGuXr8iCPa7ZMmym9hTWHc1BkL64IfbHd6ekurSojptYikmiZnHbvsb80JQdwhEkLV6006Tp3Ecq?1oBw7QYjlbavbSPXtx-Yysn_/mMmngE O CHEMICAL REACTIONS Using molarity to find solute mass and solution volume Jasmine Calculate the volume in liters of a 0.00101 mmol/L magnesium fluoride solution that contains 150. g of magnesium fluoride (MgF2). Be sure your answer has the correct number of significant digits. IIDraw a calibration curve using the data set given below. Show and explain LOD and LOQ. Determine the dynamic linear range by examining the linearity of the absorbance measurements against Metal atoms concentration. Also Explain calibration methods. (hint: there are there types of methods. These are internal, external and standard addition methods) Metal, ppm Absorbance 0.220 0.044 0.440 0.090 1.100 0.228 2.200 0.465 4.400 0.932 6.600 1.187