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- Standardization of EDTA solution
Trial number |
Volume of EDTA used (mL) |
1 |
9.7 |
2 |
8.9 |
3 |
9.4 |
Calculate Average Molarity of EDTA and Relative Average Deviation (R.A.D.)
- Hardness Titration
Trial number |
Volume of EDTA used (mL) |
1 |
12.2 |
2 |
12.6 |
3 |
11.6 |
Average ppm CaCO3 and Relative Average Deviation (R.A.D.) I need.
M(Ca2+)+V(Ca2+)->M(EDTA)+V(EDTA)
0,01M + 10ml -> ? + V(EDTA)
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- . 100 ml boiled cooled and filtered water sample takes 9.6 ml of M/50 EDTA in titration. The Permanent hardness of the water sample in terms of ppm of CaCO3 equivalent isFelodipine calcium channel blocker standard (0.251mg/ml) and felodipine sample (0.245mg/ml) solutions were prepared and injected to the HPLC. The peak area of felodipine standard is 275428 and the sample is 272982. The potency (purity) of felodipine standard is 98.9%. What is the assay percentage of felodipine? a. 102.23 b. 98.71 c. 101.07 d. 100.42Ooldtion Table 1. Measurements for standardization of NaOH Trial 1 Trial 2 Trial 3 1] Tared mass of KHC3H4O4 (9) 0.374 0.325 0.357 12] Burette reading of NaOH, initial (mL) 4.59 3.61 4.03 [3] Burette reading of NaOH, final (mL) 22.03 18.77 21.17 Part B. Molar Concentration of an Acid Solution Enter the number corresponding to the type of acid you have 1. HA 3 2. H2A 3. H3A Enter the unknown number. 21 Table 2. Measurements for titration of unknown acid Trial 1 Trial 2 Trial 3 [1] Volume of acid (mL) 25.0 25.0 25.0 [2] Burette reading of NaOH, initial (mL) 2.13 2.48 3.68 [3] Burette reading of NaOH, final (mL) 24.10 24.52 25.56 Part C. Percentage by Mass of an Unknown Solid Enter the number corresponding to the type of acid you have 1. HA 3 2. H2A 3. H3A Enter the unknown number. 30 Molar mass of the unknown acid 192.14 Table 3. Measurements for titriation of solid Trial 1 Trial 2 Trial 3 [1] Mass of sample (g) 26.334 29.157 27.111 [2] Burette reading of NaOH, initial (mL) 3.21 1.48…
- 10) 1.0 gram of CaCO3 was dissolved in HCl and the solution was made up to 1000 ml with distilled water. 50 ml of the solution required 45 ml of EDTA solution for titration, 50 ml of hard water sample required 28 ml of EDTA and after boiling and filtering required 15 ml of EDTA solution. Calculate Temporary Hardness. A. 288.6 ppmB. 166.6 ppmC. 88.6ppm 11) Calculate the Permanent Hardness for No. 10 A. 111 ppmB. 222 ppmC. 333 ppm 12) Calculate the Total Hardness for No. 10 A. 421.6 ppmB. 621.6 ppmC. 521.6 ppmConc. of NaOH: TRIAL 1 TRIAL 2 TRIAL 3 Mass of flask 81.061 g 69.692 g 96.039 g Mass of flask and vinegar 83.010 g 71.578 g 97.940 g Mass of vinegar 1.949 g 1.886 g 1.901 g Volume of vinegar 2.00 mL 2.00 mL 2.00 mL Initial buret reading Final buret reading 17.0 mL 17.5 mL 16.0 mL Volume of NaOH delivered 17.0 mL 17.5 mL 16.0 mL Moles of NaOH delivered 0.0325 moles 0.0314 moles 0.0317 moles Moles of acetic acid in vinegar 0.0016 moles 0.0016 moles 0.0016 moles Mass of acetic acid in vinegar 0.097 g 0.094 g 0.095 g Molarity of acetic acid in vinegar 0.811 M 0.785 M 0.791 M Average molarity of acetic acid 0.796 M % by mass of acetic acid in vinegar Average % mass of acetic acid in vinegar Standard deviation of % mass acetic acidCalculate the water hardness (mg L-1 of CaCO3) (i.e. calculate the mass of CaCO3) please show working out. thank you :) Sample No. 1 2 3 4 Final Burette reading (mL) 24.40 46.90 24.70 47.20 Initial Burette reading (mL) 0.10 24.40 2.10 24.70 Final-Initial Titre (mL) 24.30 22.50 22.60 22.50
- A fish sample was analyzed for crude protein content using the Kjeldahl method. Thefollowing data were recorded: Moisture content 10.0%Weight of sample 2.15 gNormality of HCl used for titration 0.121 NHCl used for sample 28.5 mLHCl used for reagent blank 0.2 mL Calculate crude protein content on wet weight basis of the fish sample, assuming fishprotein contains 20% nitrogen.Volume of dye solution added (mL) 9.80 mL Concentration of bleach solution used (M) 0.090 M Volume of bleach solution added (mL) 0,20 mL. Total Volume of solution (mL) 10.0 mL O5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 ABS Ln Abs = -4.860e-2 t + 1.35e-1 0.0 INABS -0.2 -0.4 1/ABS -0.6 -0.8 -1.0 -1.2 -1.4 Time (s) -1.6 b) From the data above, what are the initial molar concentrations of [dye] and [bleach] for your experiment? (NOTE: The concentration of the stock yellow dye solution is 3.40x10 M) [dye)o (M) [bleach]o (M) In AbsorbanceConcentration EDTA (M): 1.94e-3 Trial #1 Trial #2 Trial #3 Volume of Water Sample titrated (mL): 25.00 25.00 25.00 Volume EDTA used (mL): 36.23 39.00 37.77 Calculate the average of the volume of EDTA used. Calculate the number of moles of EDTA solution required to titrate the water sample. The total hardness is due to one or a combination of Ca2+, Mg2+, and Fe2+ in your sample. It is convenient to express this hardness as though it was entirely due to Ca2+. Making this assumption, determine the number of moles of Ca2+ present in the bottled water sample. The total hardness and the information on Table 1 is always listed in parts-per-million (ppm) of CaCO3 (or mg CaCO3/KgH2O). Since the density of water is 1.0 g/mL, one ppm would be the same as the number of mg of CaCO3 per liter of water. Determine the number of moles of CaCO3 present in the bottled water, assuming all the Ca2+ combine with CO32−. Calculate the number of grams of CaCO3 present and convert to mg.…
- what weight of betazole phosphotungstate might be expected in the assay of 0.1550 g sample of betazole hydrochloride containing 98% C5H9N3.2HC? Gravimetric factor = 0.0909ers is or h of Part B using a control serum: 2. The following are the results of a series of bicarbonate determinations (mmol/L) run in September Calculate the: a) mean b) median 27, 25, 25, 25, 24, 24, 26, 25, 24, 25 c) mode 25 37.5? 25 d) standard deviation 24 ° ( ! ! ! ! / SY Frrrrrr gr d d 24 -24 danmun son -25 -27 25+25 format. } 251 २ 1 rithin than er the + S-SUM Rnd (-) S-VAR 2 Ran# X! d/c a b/c x" STO RCL ENG SHIF 0999 8 x10xQ) water hardness of each trial and average ppm with calculation, please. Hard Water Trial 1 Hard Water Trial 2 Hard Water Trial 3 Initial Syringe Reading 1.0ml 1.0ml 1.0ml Final Syringe Reading 0.88ml 0.84ml 0.85ml Volume of EDTA Consumed 0.12ml 0.16ml 0.15ml Water Hardness ppm CaCO3 Average ppm