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- Volume of an unknown used was 30 mL, Initial Buret volume was 0 and the Final Buret volume was 8.5 mL. What is the molarity of the unknown solution if the Net volume of NaOH being used was 8.5 mL and Millimoles (mmoles) NaOH reacted was 0.791? Then, what is the Mass (g) of Acetic Acid in unknown sample and thr average percent (%) Acetic Acid? (assume density = 1g/mL)the answer is 133.33kPa N2, 20kPaAr, and 9.7333kPa CH4, i need solution steps and in the significant figure, thanks!Mass solute needed to prepare 0.500L of 0.2 M NaCO3 from a solid NaCO3 with a purity of 92.0wt%
- A 25.0 mL solution containing acidified Na2C2O4 requires 15.0 mL of 0.0500 M KMnO4 solution to reach endpoint. 5 C2O42- + 2 MnO4- + 16 H+ → 10 CO2 + 2 Mn2+ + 8 H2O Given the balanced chemical reaction above, what is the concentration (in molarity) of the Na2C2O4 solution? Answer: _____ MSolution of Pb(NO3)2 and NaCl are combined, resulting in concentrations of 0.0050 M Pb(NO3)2 and 0.00250 M NaCl immediately upon mixing. select the correct description of the final solution, given that the Ksp of PbCl2 is 1.7x10^-5. A) NaNO3 Precipitates B) All solutes reamin soluable C) Pb(NO3)2 precipitates D) PbCl2 precipiates E) All Solutes precipitate.Consider the reaction of Potassium Phosphate and Nickel (II) Bromide, where 15.00 ml of 0.7000M K3PO4 is mixed with 15.00ml of 0.2000M NiBr2 (and the final volume is 30.00 ml, that is there is no change in volume upon mixing). Your answer has to include all of the following: What is the limiting reagent? What is the identity and mass of precipitate formed? What is the concentration of the alkali metal that is a spectator ion? What is the concentration of the excess phosphate?
- Prepare 50ml of approximately 1000ppm Mn stock solution from MnCl2*4H2)The thiourea in a 1.455 g sample of organic material was extracted into a dilute sulfuric acid solution and titrated with 37.31 mL of 0.009372 M Hg2+ via reaction: 4(NH2)2CS + Hg2+ →[(NH2)2CS]4 Hg2+ P.S. Answer only the last two letters of the following questions. (Only C and D) a. Is this an example of total analysis technique or concentration technique? Explain. b. Calculate the percent (NH2)2CS ( 76.12 g/mol) in the sample. c. What is classification of the analysis based on the amount of sample and amount of analytes present? Explain. d. If the true value is 10.00%, calculate the absolute and relative error.Prepare 0.1 M solutions of NaOH and 0.1 M ethyl acetate using high-purity distilled water. So, weight desired amount of NaOH and ethyl acetate and dissolved in dH2O to prepare stock solution in equal molarity. Mw (NaOH) = 40.0 g/mol , Mw (EtOAc)= 88.1 g/mol, Density(EtOAc): 0.898 g/cm3
- Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. From the stock solution (0.020 M), pipet 4.00 mL and dilute to 100.00 mL. From the diluted solution, pipet 0.00, 1.00, 1.50, 2.00, 2.50, 5.00 and 7.50 mL aliquots into 100 mL volumetric flasks. Dilute to mark. Determine the concentration of each standard solution and tabulate.By pipet, 15.00ml of the stock solution of potassium permanganate (KMn04) that was prepared by dissolving 13.0g KMn04 with DI H20 in a 100.00ml volumetric flask, diluting to the calibration mark was then transferred to a 50.00ml volumetric flask and diluted to the calibration mark. Determine the molarity of the resulting solution.SO4 -two content in 7689mL of a water sample was precipitated as Na2SO4. The precipitated was filtered, washed and calcined in an empty crucible with a mass of 27.0234g. The mass of the crucible plus Na2SO4 (142g/mol) was 27.7708g. Calculate the %m/v of Na (23g/mol) and the concentration of Na in the sample in ppm.
