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Chemistry
how can find the thin layer with EPMA (electron probe micro analyzer ? please Explain how can find this graph Anodizing: 1. A
please explain only this graphs
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- Which of the following is/are characteristic of silica as stationary phase in chromatography? O It has higher sample capacity. O It has wider range of most useful forms. O It is polar. O All of the above12.What should we use a) to measure 5.50 g of CuSO4·5H2O: ______________________ b) To dry CuSO4 over silica gel and prevent it from absorbing water:What is laser ablation and how can it he used to sample solids for ICPMS?
- 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?Define the following terms :(i) Sorption(ii) Tyndall effect(iii) ElectrophoresisAn analysis of a sample by TLC was used on a silica plate and a non-polar mobile phase revealed 2 spots of ultraviolet light. The first spot shifted 3.2 cm, the second 5.6 cm, and the mobile phase 6.8 cm. calculate the Rf of the compound with the highest polarity
- For indirect iodometric analysis of copper oxide, why did you not need to accurately weight out ki used in the standard and unknown analysis?kindly answer this problem and follow this format GIVEN REQUIRED SOLUTION and write regibly thank you so much For the adsorption of a substance A from aqueous solution by charcoal at25oC the freundlich constants are n=3.0 and k=0.50 for y in grams per gramand C in grams per liter. What weight of a W is adsorbed by 2 g of charcoalfrom 1 L of a solution containing originally 2 g of the substance?Which of the following cannot be used as adsorbent in column chromatography? a. Silica gel b. Magnesium oxide c. Alumina d. Potassium permanganate
- the efficiency of a chromatographic column improves the measure thata.increases the height of the theoretical dishesb.decreases the number of theoretical platesc.platform height is reducedd.None of the above Please explain it Provide clear handwriting and clear imageWhy are adsorbate particles attracted and retained on the surface ofadsorbent?For Indirect Iodometric Analysis of Copper... ~0.0896g KIO3 necessary to consume 350mL of 0.1 M Na2S2O3, Na2S2O3 is stored in an amber glass bottle until ready for use. Primary Standard KIO3 has 2g of KI, 50mL of DI water, and 10 mL of 1.0M HCl is added then immediately titrated with Na2S2O3 until medium yellow or straw... then 5mL of starch indicator is added and titrated again until blue black color turns clear. Unknown CuO use 1.2G of Unknown, 20mL of HNO3 heated until sample dissolved, 25 mL of DI water added and boiled until clear light blue color, after cooling 1:1 NH3 added (~34.47 mL of NH4OH reagent) until permanent deep blue color amine complex, 2g of NH4HF2 added and swirled until dissolved, 3 g of KI is added then titrated immediately with Na2S2O3 until brown color of iodide is nearly gone (brown milk color), 2 g of KSCN and 3 mL of starch indicator is then added with titration continuing until disappearance of new blue black color. 1. Na2CO3 is often added to thiosulfate…