To find Qut the nicked jon concentraion im a dolution Porepared Joy mixing 361m2 of oo414m uckel mitote with 43 ml of o.399 m Sodium त्पटR [nपननnade uwsrTnपक3m0L0+ yeroxide ? the kP of nickel hydroxide IS S.48XI0=16. Ni2t 3. %3D
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- Determine the percentage Fe in a sample of limonite from the following data:Sample : 0.5000g ; KMnO4 used = 50.00 ml ; 1.000ml of KMnO4 is equivalent 0.005317 g Fe,FeSO4 used = 6.00 ml; 1.000ml FeSO4 is equivalent 0.009200 g FeO ( ans 44.59 %)How many milliliters of 1.5% alcoholic dimethylglyoxime should be used to provide a36.0% excess with 0.6984 q of steel containing 2.95 wt% Ni? Assume that the densityof the dimethylglyoxime solution is 0.790 g/mL. a. How much Ni sample is present? b. How many moles Ni is present in the sample? c. How much DMG is present?A sample of iron ore weighing 800 mg was treated with HNO3 , boiled to dryness and redissolved in dilute HCl. After filtration and removal of undissolved silica, the liquid was passed through a Walden reductor. The collected sample was titrated with 0.0210 M KMnO4 , requiring 12.0 mL to reach the end point. Calc %Fe (55.845) in the ore.
- The thickness of the chromium plate on an auto fender is determined by dissolving a 30.0-cm2section in acid and oxidizing Cr3+ to Cr2O72-with peroxydisulfate. After removing excess peroxydisulfate by boiling, 500.0 mg of Fe(NH4)2(SO4)2•6H2O is added, reducing the Cr2O72-to Cr3+. The excess Fe2+ is back titrated, requiring 18.29 mL of 0.00389 M K2Cr2O7 to reach the end point. Determine the average thickness of the chromium plate given that the density of Cr is 7.20 g/cm3. Note: thickness = volume /areaA chemist obtained the following data for the percent compound Z in triplicates (n=3) of an insecticide preparation: 7.47, 6.98, and 7.27. Calculate the 90% confidence limit for the mean of the data assuming that only information about the precision of the method is the precision for the three data points.Quickly plezz!! The levigating agent role in Suppositories manufacturing ??
- A device to understand how iron behaves at high temperatureswe want to design. This device (with 1% accuracy) allows the change in volume (heating) of a 1cm 3 iron cube.the resulting polymorphic transformation) must be able to feel. HMK structure in iron 911 0 C and latticeparameter 0.2863 nm. At 913 0 C, it has YMK structure and its lattice parameter is 0.3591 nm. Of measuring instrumentDetermine the accuracy tolerance it needs (i.e. at least how many cm 3 to detect a changemust). It is necessary to use at least 6 digits after the comma in this question. Hint: YMK first andFor HMK, the volume of an atom is found and then, using the number of atoms in each structure, the ironThe question can be started by finding the different volumes.Find the initial solution using Vogel's approximation method. It is necessary to fill all the cells, in the case of the blank cell it is neccessarry to select dashed line ("--"). O1 O2 O3 O4 Supply D1 18 8 13 14 200 Answer30025015010050--- Answer30025015010050--- Answer30025015010050--- Answer30025015010050--- D2 10 10 16 14 200 Answer30025015010050--- Answer30025015010050--- Answer30025015010050--- Answer30025015010050--- D3 16 15 11 14 300 Answer30025015010050--- Answer30025015010050--- Answer30025015010050--- Answer30025015010050--- Demand 50Solution for 0.105g of the K3[Fe(C2O4)3] (MW= 437.2 g/ mol) were dissolved in sulfuric acid and got rated with 9 mL of 0.028M KMn04. What is the experimental weight percent of oxalate in the sample?
- An analyst obtained the following data for the percent compound Z in triplicates (n=3) of an insecticide preparation: 7.47, 6.98, and 7.27. Calculate the 90% confidence limit for the mean of the data assuming that only information about the precision of the method is the precision for the three data points.The data below give the concentration of thiol (mM) in the blood lysate of the blood of two groupsof volunteers, the first group being ‘normal’ and the second having rheumatoid arthritis (Banford, J.C.,Brown, D.H., McConnell, A.A., McNeil, C.J., Smith, W.E., Hazelton, R.A. and Sturrock, R.D., 1983,Analyst, 107: 195): Normal: 1.84, 1.92, 1.94, 1.92, 1.85, 1.91, 2.07Rheumatoid: 2.81, 4.06, 3.62, 3.27, 3.27, 3.76 Verify that 2.07 is not an outlier for the ‘normal’ group.The thickness of the chromium plate on an auto fender is determined by dissolving a 30.0-cm2 section in acid and oxidizing Cr3+ to Cr2O7 2-with peroxydisulfate. After removing excess peroxydisulfate by boiling, 500.0 mg of Fe(NH4 )2 (SO4 )2•6H2O is added, reducing the Cr2O7 2- to Cr3+ . The excess Fe2+ is back titrated, requiring 18.29 mL of 0.00389 M K2Cr2O7 to reach the end point. Determine the average thickness of the chromium plate given that the density of Cr is 7.20 g/cm3 . Note: thickness = volume /area