a. b. K ArK c. Cl NE 30 5 d. TiAr 1 3d2 Ho 2 Write the electronic configurations for each of the following ions. а. А13+ b. 02- с. Rb* d. Cl A paper chromatography experiment with metal ions gave the following R values: Ni2+ = 0.34, Fes- 0.45, Crt = 0.27, Cu2 = 0.15. An sample of with a
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- Two commonly used chromatography methods in labs are Nickel and streptavidin resin based colums. Explain which type of chromatography-ion exchange, size-exclusion, or affinity-these are, as well as their seperation mechanisms at a molecular level.1. What is the significance of Rf values?2. What is the basis for the separation of components of mixtures by paperchromatography?3. Give 3 important applications of chromatography.4. Define or describe each of the following terms: - Chromatography- Development- Solvent front- Stationary phase - Chromatogram- Adsorbent- Mobile phase- RfI don't understand how you calculated the w1/2 for part c... where did the 5.54 come from? And can you answer the last part of the question-> d) If the volume ratio of the stationary phase to mobile phase is 0.25, find the distribution constant for compound 1.
- What are the parameters that can be used for analytes identification and quantification using Cyclic Voltammetry, respectively?One common way to determine phosphorous in urine is to treat the sample after removing the protein with molybdenum (VI) and then reducing the resulting 12-molybdophosphate complex with ascorbic acid to give an intense blue-coloured species called molybdenum blue. The absorbance of molybdenum blue can be measured at 650 nm. A 24-hour urine sample was collected, and the patient produced 1122 mL in 24 hours. A 1.00 mL aliquot of the sample was treated with Mo (VI) and ascorbic acid and diluted to a volume of 50.00 mL A calibration curve was prepared by treating 1.00 mL aliquot of phosphate standard solution in the same manner as the urine sample. The absorbances of the standards and the urine sample were obtained at 650 nm and the following results were obtained. ppm, P aBSORBANCE (A) 1.003.00 0.230 2.00 0.436 3.00 0.638 4.00 0.848 Urine sample 0.518 ffind the slope and intercept, then graph it.Explain how to obtain larger particles based on the relative supersaturation
- 21. (What exactly is meant by potentiometric methods? What are they even?)The following Rf values were computed from a normal phase chromatography experiment. Arrange them from most polar to least polar. I - 0.25 II - 0.84 III - 0.56 IV- 0.67A spectrophotometric method for the quantitative determination of the concentration ofPb2+ in blood yields an Ssamp of 0.133 for a 1 mL sample of blood that has been diluted to 6 mL. A second sample is spiked with 1 µL of a 1467 ppb Pb2+ standard and diluted to 6 mL, yielding an Sspike of 0.491. Determine the concentration of Pb2+ in the original sample of blood.
- Chemistry Briefly describe the differences between the scanning and SIM approaches with reference to your data. Discuss how and why your scanning (TIC) and SIM (mass chromatograms look different. Pay particular attention to selectivity of compounds detected and signal-to-noise. What are some advantages of SIM? What are some disadvantages?True of false? 1. Raman Spectroscopy can be used in the airport to detect the presence of Alcohol in the bags? 2. Furnace atomisation is used when the concentration of the sample in the ppb level? 3. 24 karat of gold mean the percent of gold in the object is 75%?(h) Describe a chromatographic technique that could be suitable for studying the molecular weight distribution of poly(phenylenevinylene) derivatives that are soluble in organic solvents. Explain the physical basis on which separation could occur and suggest how the polymers could be detected after elution.