Calculate the volume of 0.0864 M EDTA needed to titrate the Ca in a 1.028 g mineral specimen that is 72.5 % brushite, CaHPO4.2H2O (172.09 g/mol).
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- To analyze the amount of iron (Fe; Mw = 55.85 g/mol) contained in an ore sample, the sample was digested with acid and diluted to 50 mL with water. This solution was then treated with 25.00 mL of 0.2922 M EDTA. The excess EDTA was back titrated with 6.47 mL of 0.0843 M Zn2+ to reach the equivalence point. How many grams of Fe contained in the ore sample?1,5419 g of magnetite (Fe3O4) ore; Fe+2 and Fe + 3 in concentrated HCL to form a mixtureit's unraveling. Adding HNO3 to all Fe +2s Fe +3 e and Fe+3 s NH, addingwith Fe(OH)3, precipitating into. Sediment in the form of Fe3O4 after necessary operationsand 0.8525 g. Calculate the percentage of Fe3O4 in the sample.As part of a geological team that studied a local cave, you brought with you a bunch of 1.00 g rock samples to be studied. Each rock was prepared and titrated against 0.050 M EDTA. a. Calculate the percent calcite (CaCO3) content of rock A if it was titrated with 48.0 mL EDTA
- As part of a geological team that studied a local cave, you brought with you a bunch of 1.00 g rock samples to be studied. Each rock was prepared and titrated against 0.050 M EDTA.a. Calculate the percent calcite (CaCO3) content of rock A if it was titrated with 48.0 mL EDTAb. Calculate the percent brucite (Mg(OH)2) content of rock B if it was titrated with 76.5 mL EDTA(a) What is the percentage of MnO2 in a pyrolusite ore if a sample weighing 0.4000g is treated with 0.6000g of pure H2C2O4•2H2O and dilute H2SO4 and after reduction has taken place (MnO2 + H2C2O4 + 2H+→ Mn2++ 2CO2 + 2H2O), the excess oxalic acid requires 26.26ml of 0.1000N KMnO4 for titration? (b) If pure As2O3 were used instead of oxalic acid, how many grams would be required in order for the other numerical data to remain the same?A 0.5745 g sample of an alloy containing principally bismuth and lead is dissolved in nitric acid and diluted to 250.0 mL in a volumetric flask. A 50.00 mL aliquot is withdrawn, the pH adjusted to 1.5, and the bismuth titrated with 30.26 mL of 0.01024 M EDTA. The pH of the solution is then increased to 5.0 and the lead titrated with 20.42 mL of the same EDTA solution. Calculate the percentages of lead and bismuth in the alloy.
- The amount of Fe in a 0.4891 gm sample of an ore was determined by redox titration with K Cr , 0 ,. The sample was dissolved in HCl , and the iron brought into ( +2 ) oxidation state . The titration to the end point required 36.92ml of 0.02153 M K Cr , 0 ,. Report the iron content of the ore as % w / w Fe 03 .Silver(ag) is obtained in much of the same manner as gold using NaCN solution and O2. Describe with appropriate equation the extraction of Ag from argentite Ag2S. The products are SO2 and Ag(CN)2 which are reduced with ZN?(a) What is the percentage of MnO2 in a pyrolusite ore if a sample weighing 0.4000 g is treated with a 0.6000 g of pure H2C2O4.2H20 and dilute H2SO4 and after reduction has taken place (MnO2 + H2C2O4 + 2H+ Mn2+ + 2CO2 + 2H2O), the excess oxalic acid requires 26.26 mL of 0.1000 N KMNO4 for titration? (b) If pure As2O3 were used instead of oxalic acid, how many grams would be required in order for the other numerical data to remain the same?
- An acidic solution of copper (.35 M Cu+2) was treated with KOH until Cu(OH)2 precipitated. At what pH does this occur at?Calculate the % Copper in the alloy using the average titration vallue. given:Devarda alloy= 0.518g [EDTA] = 0.02 mol•dm^3 average titration number= 6.84cm^3The amount of iron in a meteorite is determined by a redox titration using KMnO4 as the titrant. A 2.1800 g sample is dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+ using a Walden reductor. Titrating with 0.02500 M KMnO4 requires 22.0 mL to reach the end point. Determine the %w/w Fe2O3 in the sample of meteorite.
