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- I want Q3 (a) and (b) and (c)Write the faults of the glass electrode. (Please write it correctly and concisely.)In a moving boundary experiment with 0.1N KCI using 0.005N LICI, as indicator solution, a constant current of 0.005893 amp was passed for 2130 seconds and the boundary was observed to move through 5.6cm in a tube of 0.1142 sq.cm. .cross-section. Calculate the transport number of K+ and CI – ions .a t- = 0.492, t+ =0.508 t+ = 0.402, t- =0.598 .b O .c O t+ = 0.492, t- =0.508 .d O t+ = 0.402, t- =0.598
- A bare silver wire electrode is dipped into a solution 0.05M in KNO3 (supporting electrolyte) and saturated in AgBr (Ksp = 5.0 x 10-13), and connected to the back of an mV/pH meter along with a saturated calomel reference electrode. Calculate the potential of the silver indicator electrode. Calculate the cell potential.Use the shorthand notation to describe a cell consisting of a saturated calomel reference electrode and a silver indicator electrode for the measurement of (a) pSCN. (b) pI. (c) pSO3 (d) pPO. Then, generate an equation that relates pAnion to Ecell for each of the cells. (For Ag2SO3 Ksp = 1.5 * 10-14; for Ag3PO4, K,p = 1.3 *10-20 ).A sample of steel (0.506 g) was digested in acid and the solution made up to 100 cm3 with deionised water. Aliquots (25.0 cm3) of this solution were transferred into two volumetric flasks (100 cm3) labelled A and B. Flask A was made up to volume with deionised water. To flask B was added 10.0 cm3 of a 260 ppm standard solution of Mn2+ which was then also made up to volume with deionised water. The following absorbance results were obtained: Solution A = 0.356, Solution B = 0.578. Use these results to calculate the percentage (% w/w) of manganese in the steel sample.
- Required: Normality of IodineThe resistances of a series of aqueous NaCI solutions, formed by successive dilution of a sample, were measured in a cell with cell constant (the constant C in the relation κ = C/R) equal to 0.2063 cm-1. The following values were found: c/(mol dm-3) 0.00050 0.0010 0.0050 0.010 0.020 0.050R/Ω 3314 1669 342.1 172.5 89.08 3714(a) Verify that the molar conductivity follows the Kohlrausch law and find the limiting molar conductivity. (b) Determine the coefficient κ, (c) Use the value of κ (which should depend only on the nature, not the identity of the ions) and the information that λ(Na+) = 5.01 mS m2 mol-1 and , λ(I-) = 768 mS m2 mol-1, to predict (i) the molar conductivity, (ii) the conductivity,(iii) the resistance it would show in the cell, of 0.010 mol dm-3 Nal(aq) at 25 °C.6
- (i) Calculate the capacity factors (k') for both compounds A and B and the selectivity factor (a) between them, commenting on the values. (ii) Calculate the resolution between A and B and comment on it. (iii) Using the peak for A, calculate the number of theoretical plates for the GC column and comment on the quality of the column.1- Calculate +he equilibrium constant at 25 ċ For the reaction: 2H+ Dzcg) =Hzegs+ 2D" From the eleetrode potential for D/ Dz tptrwhich is -3-4 mv at 25¢?5 A 0.400-g sample of toothpaste was boiled with a 50.00 mL solution containing citrate buffer and NaCl to extract the fluoride ion. After cooling, the solution was diluted to exactly 100.00 mL. The potential of a selective ion/calomel system in a 25.00 mL aliquot of the sample was found to be -0.1823 V. Addition of 5.00 mL of a solution containing 0.00107 mg F/mL caused the potential to change to -0.2446V. Calculate the weight-percent F in the sample