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How can the matrix effects affect the determination of phosphate in seawater by using AAS?
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- How can the matrix effects affect the determination of Calcium in seawater by using AAS?What are the advantages of a dropping-mercury electrode in polarography? Why is polarography used mainly to study reductions rather than oxidations?Discuss the advantage and disadvantage of Wijs method of iodine value determination. What non-titrimetric method can be used to determine the iodine value of edible oil? Discuss its basic principles and general methods involved.
- Explain the function of each electrode in the polarography cellThe activity of M g2+ in seawater is 10 ^ - 1.87 at what pH would seawater, amorphous silica, and sepiolite all be in equilibrium?Discuss the advantages, disadvantages, and limitations of the technique of cyclic voltammetry in both qualitative and quantitative measurements.
- Explain why ionic attractions are weaker in media with high dielectric constants, e. g.,water and aqueous buffers.Zinc is to be used as an internal standard for the polarographic analysis of thallium. A standard solution containing twice the concentration of zinc as Thallium has a diffusion current of 1.89 µA for Ti and 3.50 µA for Zn. A 10.0g alloy was dissolved in 500 mL, 25 mL of this solution was mixed with 25 mL of 1.0 x 10-3 M Zn 2+ solution. The diffusion currents of this final solution are 18.2µA for Tl+ and 14.5µA for Zn+. Calculate % Ti in the sample analysed1) Name the applications of glass electrodes in potentiometric measurements (please write correctly and concisely).
- 1. What are the scientifically proven bioactivity of VCO that is beneficial to human health? 2. Discuss the advantage and disadvantage of Wijs method of iodine value determination. What non-titrimetric method can be used to determine the iodine value of edible oil? Discuss its basic principles and general methods involved.Calculate the Debye length (1/k) of the double electric layer near the charged surface in KCl solutions of two concentrations c1 =0.01 M and c2= 0.1 M.By employing a given conductivity cell with 0.1N potassium chloride at 18pC, an observed conductance of 0.025 mho was obtained. What is the cell constant if the specific conductance of KCL at 18°C is 0.0112 mho.