The weight of 0.1012 g of magnesium sulphate consumed 14.5 mL of EDTA solution (0.05M). What is the percentage purity of the magnesium sulphate? 0.006019 g (equivalent factor) of M9SO4 =1 mL Disodium edetate (0.05M) O A. 89.18 % w/w O B. 90.82 % w/w O C. 86.24 % w/w O D. 88.45 % w/w
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- 2. A 0.5131-g sample containing KBr is dissolved in 50 mL distilled water. Titrating with 0.04614 M AgNO3 requires 25.13 mL to reach the Mohr endpoint. A blank titration requires 0.65 mL to reach the same endpoint. Report the % (w/w) KBr in the sample. [Ans. 26.19 % (w/w)]وام اول 1) 25 mL Ag No3 react with 5mM Nacl ý 35 ml of (AgNez ) silver Solution is required to titrate ZnClz are present inthe Sample: 2) Calculate the amount of lime( Ca0) that Gon be prepared by heating 200kg of limestone that is 95% Pure Cacos M.Wt. aCo3=lo0 M.wt Cao-56-1 Ca Co3 » Cao+ Co 3) What Volume of 12M and 3M HCl must be mixed to give $ 1 liter of 6M HCl 4) Cal Culate the molar Concentrationof acetic acid Solution which is z% ionized. 5) GI Culate he PHofu Sdution which results from the mixind of 50.0ml of o SM HCl which 5omL of o.4M NH3. ) CalCulate the extent of hydrolysis in a o.ol M Solutio-1. Describe the preparation of a) 500 ml of 0.0550 M silver nitrate solution from solid silver nitrate b) 5.00 L of a solution that is 0.0800M in K* starting with solid K3FE(CN), c) 2.00 L of 0.135 M perchloric acid from the commercial reagent [60% perchloric acid (w/w), specific gravity 1.60] d) 9.50 L of a solution that is 60.0 ppm in Na*starting with solid Na,sO4.
- A 0.5131-g sample containing KBr is dissolved in 50 mL distilled water. Titrating with 0.04614 M AgNO3 requires 25.13 mL to reach the Mohr endpoint. A blank titration requires 0.65 mL to reach the same endpoint. Report the % (w/w) KBr in the sample. [Ans. 26.19 % (w /w)]2. A 0.5131-g sample containing KBr is dissolved in 50 mL of distilled water. Titrating with 0.04614 M AgNO3 requires 25.13 mL to reach the Mohr end point. A blank titration requires 0.65 mL to reach the same endpoint. Report the %w/w KBr in the sample.A mined alloy sample weighing 2.0840 g is dissolved in minimal amounts of concentrated HNO3 before diluted to 50 mL. Ten mL of this diluted sample was titrated using 0.091 M KSCN and required 14.20 mL to reach the endpoint. Calculate the concentration of silver (%w/w) in the mined alloy. (Hint: A dilution factor (DF) is needed in the formula.) Titration reaction: Agt + SCN- → A9SC'N(s) FW: Ag = 107.87 %3D
- A 0.501 g sample of sulfathiazole was assayed usingdiazotization with 0.1905M NaNO2 VS, using 18.7 mLof the titrant. Each mL of 0.1 M NaNO2 is equivalentto 25.53 mg of C9H9N3O2S2. What is the % purity?A. 1.4639 g sample of limestone was analyzed for Fe, Ca and Mg. The iron was determined as Fe2O3, yielding 0.0357 g Calcium was isolated as CaSO4, yileding a precipitate of 1.4058 g and Mg was isolated as 0. 0627 g of MgP2O7. Report the amount of Febas %w/w Fe2O3, Ca as %w/w CaO and Mg in the limestone sample as % w/w MgOA 4.912-g sample of a petroleum product was burnedin a tube furnace, and the SO2produced was collectedin 3% H2O2.Reaction:SO2(g)+H2O2→H2SO4A 25.00-mL portion of 0.00873 M NaOH was introducedinto the solution of H2SO4, following whichthe excess base was back-titrated with 15.17 mL of0.01102 M HCl. Calculate the sulfur concentrationin the sample in parts per million.
- A solid containing tris was dissolved in water and brought to a total volume of 50.00 ml. A 10.00 ml aliquot of the solution was titrated with 0.09978 M HCl to a bromcresol green endpoint. The aliquot consumed 38.93 ml of titrant. Calculate the weight of tris in the original sample.a. A 0.3108-g sample of primary-standard-grade Na2 C204 was dissolved in H2 SO4 and titrated with 31.78 mL of dilute KMNO4: 2Mn O4 + 5C204²- + 16H+ →→ 2MN²+ + 10CO2(g) + 8H2O Calculate the molar concentration of the KMNO4 solution. Molar concentration M b. The iron in a 0.6639-g ore sample was reduced quantitatively to the +2 state and then titrated with 26.60 mL of the KMNO4 solution from part (a). Calculate the percent Fe2 O3 in the sample. Percent Fe2 O3The sulfur from 4.00g steel is evolved as dihydrogen sulfide gas and titrated with 1.60 mL of 0.05OON iodine solution. How many milliliters if iodine will be reduced by 40.00 mL of N22S2O3 solution of which 1mL thiosulfate solution = 0.006354g Cu?