How many milliliters of 0.0410 M EDTA are required to react with 50.0 mL of 0.0170 M Cu²+? volume: How many milliliters of 0.0410 M EDTA are required to react with 50,0 mL of 0.0170 M Se³+? volume: TOOLS x10 ml ml.
Q: ян О. но C=C
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- 9:1. A 250.0-mg sample of an organic weak acid was dissolved in an appropriate solvent and titrated with 0.0556 M NaOH, requiring 32.58 mL to reach the end point. Determine the compound’s equivalent weightmass of KIO3 = 0.9290g titrated volume Na2S2O3 = 28.88mL standardisation sodium thiosulfateml?ClassID=1471954077 44.00 mL of 0.50 M H2SO4 reacts with 0.35 M LIOH and reaches the endpoint using bromthymol blue as an indicator. What volume of LIOH is required for this reaction? 2LIOH + H2SO4 → LI¿SO4 + 2H2O [?] mL LIOH mL LIOH Enter
- A 0.8357 -g sample of a wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00 mL of 0.05063 M HCl; a 7.73-mL back-titration with 0.04829 M NaOH was required. Calculate % protein (Use %N = 5.70% protein for flour, feeds, cereals).A solution of HClO4 was standardized by dissolving 0.4008 g ofprimary-standard-grade HgO in a solution of KBr: HgO(s) + 4Br- + H2O → HgBr4 2- + 2OH- The liberated OH2 consumed 43.75 mL of the acid. Calculate themolar concentration of the HClO4.avg concentration: 8.937x10^-7
- You have performed an iodimetric titration using a commercial vitamin C tablet. Based on the following information below, calculate the %(w/w) of vitamin C(MM=176.16 g/mol) in the tablet: Mass of tablet dissolved in 250.0 mL: 5.422 g Aliquot volume of sample titrated: 25.00 mL Concentration of KIO3: 0.023 M Final burrette volume: 41.31 mL Initial burrette volume: 8.89 mL Blank volume: 0.14 mLCalculate the volume in milliliters of 0.362 M KOH necessary to titrate 28.38 mL of 0.279 M diprotic sulfuric acid, H2SO4, to a phenolphthalein end-point. Report the answer to a precision of 2 decimal places.4 You are preparing standard acid and base solutions for the laboratory, using potassium hydrogen phthalate (KHC H₂O, abated KHP) as the primary standard. KHP (molar mass = 204.22 ganol) has one acidic hydrogen. You prepared solutions of both NaOH and HCI. It took 22.65 mL of the NaOH solution to titrate (react exactly with) 1.55 g KHP. It then took 50.75 mL of HCI solution to titrate 25.00 mL of the NaOH solution. What is the molarity of the HCI solution?
- Chemistry If 110.0 mL of 0.0030 MNa2SO4(aq) is saturated with CaSO4, how many grams of CaSO4 would be present in the solution? [Hint: Does the usual simplifying assumption hold?] Express your answer using two significant figures. This answer not 0.07 0.084, 0.09ANALYSIS OF VINEGAR A 25.00 mL vinegar sample was diluted to 250-mL using a volumetric flask. A 50.00 mL aliquot portion of the dilute vinegar solution needed 35.45 mL of 0.1200 M NaOH to reach the phenolphthalein end point. Calculate the number of mmoles of acetic acid present in the 50-mL aliquot portion that was titrated.A phosphate buffer solution (25.00 mL sample) used for a growth medium was titrated with 0.1000 M hydrochloric acid. The components of the buffer were sodium monohydrogen phosphate and sodium dihydrogen phosphate. The first endpoint occurred at a volume of 10.32 mL, and the second occurred after an additional 18.62 mL was added, for a total volume of 28.94 mL. What was the total concentration of phosphate (in any form) in the buffer? **Please be as detailed as possible. The different volumes in this titration are a little difficult to understand** THANK you in advance.