A 5.12-g pesticide sample was decomposed and then dilute to 200-mL to determine its Cu²* contents. The analysis was completed by treating aliquots as indicated: Volume of sample, mL Volume of 3.82 ppm Cu²*, mL Signal 50.0 0.00 0.512 50.0 4.00 0.844 a. Calculate the percentage of copper in the pesticide sample. b. What assumption did you make in calculating the concentration of copper in your sample?
Q: Production of 0.005 M I; Solution Dissolve 10 g KI in 20 mL of deionized water in a 150 mL capacity…
A: Molarity: Number of moles dissolve in per liter volume of solution is called as molarity. It shows…
Q: The same chloride analysis but using a new method for which the standard deviation was not known,…
A:
Q: Calculate the [FeSCN2+] using volumes of stock solutions. Presume that all the SCN– ions react.…
A: The data given is,
Q: A 10 ml of ascorbic acid (MW=176.1) injection was transferred to a 100 ml volumetric flask and made…
A: First, we have to find the concentration of iodine solution using the volume and molarity of the…
Q: Table 1. Data on EDTA Standardization Weight of CaCO3 (g): 0.2003g Trial Volume of EDTA (mL)…
A: Each of Ca2+ is neutralised with 1 mol of EDTA. Also, No of moles = Mass / Molar mass
Q: in a standard addition calibration method, 50.0 ml volumetric flasks were used. A 5.0 ml aliquot of…
A:
Q: A5.12-g pesticide sample was decomposed and then dilute to 200-ml to determine its Cu" contents. The…
A: Absorbance: It is a measure of the quantity of light that is absorbed by the sample. It is also…
Q: A banned pesticide, DDT, is analyzed through gas chromatography. A DDT standard is diluted…
A: In analytical chemistry a calibration curve or standard curve, is plotted to determine the…
Q: A 100 mL of 0.125 M CH₂COOH solution was shaken with 1.2 g charcoal for 5 min. After filtration, 10…
A: I have given a detailed solution for the problem as follows:
Q: I need help calculating the following values please!!!!!
A: 1.) Volume of EDTA used is calculated as : Final burette reading - Initial burette reading 2.)…
Q: Felodipine calcium channel blocker standard (0.251mg/ml) and felodipine sample (0.245mg/ml)…
A: Given that: concentration of felodipine standard = 0.251mg/ml concentration of felodipine sample =…
Q: An analysis was carried out on a 1.5-gram sample of feed, the moisture was 28%, and when estimating…
A:
Q: 20.0 mL water sample was titrated with 0.0100 M EDTA solution that required 14.50 mL for CaCO3…
A: Here we have to determine the hard ness of hard water interms of CaCO3 if 20 mlbof hard water sample…
Q: a. What mass of Ag2SO4 is formed when 34 mL of 0.300 M AgNO3 are mixed with 26 mL of 30.0 g/L…
A:
Q: Molar concentration of KMNO 0.02000 M 0.2189 3 7mL 0.3 mL 36.7mL Branhish Weight of complex iron…
A:
Q: Question 2 a experiment on thermodynamics of borax.
A: 2) a) the dissolution reaction of AgCl (s) is given as AgCl (s) -----> Ag+ (aq) + Cl- (aq)…
Q: Consider the following method for the analysis of cocaine (MW 303.35) powder. "Dissolve about 600 mg…
A: Given the mass of cocaine powder weighed = 606.3 mg molarity of HClO3 used = 0.09978 M Volume of…
Q: A sample of drinking water was tested for Pb+ and was found to have a Pb²* concentration of 17.46…
A: Given the concentration of the unspiked sample, Cunspiked = 17.46 ppb Now 1.00 mL of 2.29 ppb Pb2+…
Q: A sample of anhydrous Na2CO3 (FM = 105.989) is suspected to be contaminated with either NaHCO3 (FM =…
A: Given information: Mass of sample = 0.7483 g Volume of solution = 50.00 mL Normality of HCl = 0.0125…
Q: A 500. µl aliquot of a caffeine unknown is diluted to a total volume of 10.00 mL. A calibration…
A: The diluted solution has area = 3.07 mVcm Volume of diluted solution = 10 mL
Q: To a 0.5 g sample of impure NaCl are added 0.784 g of pure AgNO3 (MW = 169.88) crystal. This is in…
A: A precipitation reaction involves the formation of a solid, insoluble substance. In Stoichiometry,…
Q: A 10 ml of ascorbic acid (MW=176.1) injection was transferred to a 100 ml volumetric flask and made…
A: Reaction between sodium thiosulfate and iodine: 2Na2S2O3+I2→2NaI+Na2S4O6 (1)
Q: A 0.937-g sample containing Ca2+ was dissolved to produce a 500-mL stock solution. A 50-mL aliquot…
A:
Q: Commercial Vanadyl Sulfate (VOSO4) is contaminated with H2SO4 and H2O. A solution was prepared…
A: Given parameters are, Wieght of VOSO4 = 0.2447 g Volume of solution = 50.00 mL Molarity of VO2+ =…
Q: Fluoride determination can be performed photometrically with alizarin red and Zirconium acid…
A: A question based on Beer-Lambert law, which is to be accomplished.
Q: Mercury intoxication could cause tremendous harmful impacts to human, particularly nervous system…
A: There are numerous instrumental techniques for quantitative and qualitative determination of the…
Q: Internal standard. A solution containing 3.47 mM X (analyte) and 1.72 mM S (standard) gave peak…
A: (a) Calculate the response factor for X: Response factor=Area of analyte peak/Concentration of…
Q: 60 ml of standard hardness containing 1 mg of pure CaCO3 per ml consumed 22 ml of EDTA. 40 ml of…
A: A numerical problem based on EDTA complexometric titration, which is to be accomplished.
Q: 5) A 0.50 g soil sample was digested with 1.0 mL of HNO3-H2O2 mixture (1:1, v/v) and then diluted to…
A: The linear equation for copper calibration plot is: y = 0.04x + 0.0097 ________(1)
Q: Two different methods were investigated for Cu2+ detection in water sample and both methods…
A: To choose the correct option:
Q: Very pure silver nitrate standard reagent requires standardization with primary standard NaCl or KCl…
A: Silver nitrate standardization requires Nacl primary standard. It is true.
Q: i need help calculating the molar concentration for part C
A:
Q: A 5.12-g pesticide sample was decomposed and then dilute to 200-mL to determine its Cu2* contents.…
A: Absorbance: It is a measure of the quantity of light that is absorbed by the sample. It is also…
Q: Quinine in a 1.664 g antimalarial tablet was dissolved in sufficient 0.10 M HCl to give 500 mL of…
A: Given: Weight of the tablet, w = 1.664 g Molar concentration of HCl, M = 0.1 M Volume of the…
Q: A 0.32 g soil sample was digested and diluted to 481-mL. The diluted sample was analyzed for Zn by…
A: We are authorised to solve only one question at a time. Please post rest of the questions…
Q: An analyst was measuring the performance of a HPLC column. The test solute was Toluene (5 µL). The…
A: To find out the mobile phase velocity, number of theoretical plates and height equivalent to…
Q: One litre of aqueous sample containing the organic pollutant, polychlorinated biphenyl (PCB), was…
A: Distribution ratio /partition coefficient is the ratio of concentration of solute in organic layer…
Q: A graphite furnace atomic absorption spectrophotometer (AAS) was used to determine the arsenic (As)…
A: Given data Concentration Absorbance 2 0.17 4 0.28 6 0.48 8 0.53 10 0.72
Q: Weight of CaCO3 (g): 0.2003g Trial Volume of EDTA (mL) Molarity of EDTA (M) 1 8.60 2 8.50 8.55…
A: 1 mol EDTA neutralises 1 mol of CaCO3
Q: 2. A water sample from a local cave system was tested for total water hardness. An EDTA titer was…
A: The question is based on the concept of complexometric titrations. We have to calculate hardness of…
Q: A 100 mL of 0.375 M CH3COOH solution was shaken with 1.0 g charcoal for 5 min. After filtration, 10…
A: I have given a detailed solution to the question as follows:
Q: Consider the following method for the analysis of cocaine (MW 303.35) powder. "Dissolve about 600 mg…
A: For acid base titartion: Nacid x Vacid = Nbase x Vbase Since the given acid is monoprotic and there…
Q: to the kit manual 200uL of plasma was mixed with 2.8 ml of the dilution buffer, mixed well then 200…
A: Solution:- The sample's final concentration would be 15.
Q: 9. ou wish to adapt the AA method to measure the amount of iron in leaf tissues. Theminimum amount…
A: A. Mass of leaf = 6.025 g Mass% of fe in the leaf =0.0025% Mass of fe in grams = Convert…
Q: A 200 mL water sample was treated with SPE column for pe- concentration of a certain pesticide. The…
A: Introduction: High-performance liquid chromatography (HPLC) is an analytical technique to separate,…
Q: Concentration of HNO3 Solution 0.4938m Concentration of NaOH Solution 0.0992m Trial 1 Trial 2 1.23g…
A: Formula for standard deviation - SD = ∑x-μ2N were, N = number of sets μ = mean or average X = value…
Q: In the Analytical Chemistry laboratory, one of the B.Sc student Ms. Fatma wanted to analyze the…
A: (i) Given: Dilution factor is 10. The volume of solution B(diluted solution) is 250 mL.…
Q: A 0.9092 g sample of wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was…
A: (a) Given data, Mass of sample = 0.9092g Molarity of H2SO4 = 0.02532M Volume of H2SO4 = 50mL =…
Q: A fly ash (ƿ = 1.8 g mL-1) aerosol consists of particles averaging 13 µm in diameter and with a…
A:
Q: ASSAY Calibration solutions Calibration solutions of naproxen in the range 5 – 25 μg/mL were…
A: Solution- Data given- 12.3819 g were crushed to a fine powder, acetic acid (0.05 M)
solve b
Step by step
Solved in 2 steps with 2 images
- Sample IdentificationCodeConcentration of M%TA=2-log(%T)Q50004.00 x 10-417.90.75Q50013.20 x 10-425.00.6Q50022.40 x 10-435.70.46Q50031.60 x 10-450.20.3Q50048.000 x 10-570.80.15SampleIdentificationCode%TA=2-log(%T)AMQ0210150143.70.359518560.360.000192Q0210150244.10.355561410.360.00018Q0210150343.80.358525890.360.00017Q0210150444.10.355561410.360.00018Q0210150543.80.358525890.360.00017What was their percent error?43%Does Batch 021015 meet legal requirements?No, because it is not between 2.85 * 10(4) and 3.15 * 10(4)Well #DropsBluedye1234567891012345678910Drops 9Distilled water876543210Concne 0.26tration0.52Test Tube #0.781.041.3Solutions3Concentration (M)2.082.32.6Concentration (ppm)1:1 dilution11.82Starting Dilution21.562:1 dilution0A.Zero standard0Was your calibration curve as linear as you expected?B.Did you experience any âdriftâ of the resistance readings?C.What is the equation of your best-fit line?D.What commercial drink did you analyze?E.Assuming…3. At elevated temperatures, NaHCO3 is converted quantitatively to NazCO3 : 2 NaHCO3(5) = Na,CO3) + CO29) + H2O Ignition of a 0.3592 g samples containing NaHCO3 and non-volatile impurities yielded a residue weighing 0.2362g. Calculate the percent purity of the sample.Following the monograph procedure, a 724-mg of aspirin (MW=180 g/mol) dissolved in 18.5 ml of cold neutralized alcohol. This solution was then initially titrated with 0.101 N sodium hydroxide solution, then later neutralized with 0.104 sulfuric acid. What is the percentage purity of the sample? 1. What is the milliequivalent weight consumed by the acidic titrant? a. 1.5392 g-meq b. 2.0907 g-meq c. 1.4948 g-meq d. 2.1528 g-meq 2. What is the milliequivalent weight consumed by the basic titrant? a. 5.8656 g-meq b. 1.5392 g-meq c. 5.6964 g-meq d. 1.4948 g-meq 3. What is the difference of milliequivalent weight consumed in the reaction? a. -4.1572 g-meq b. 4.3708 g-meq c. 0.5515 g-meq d. 4.1572 g-meq
- A titrimetric method for the determination of calcium in limestone was tested by analysis of an NIST limestone containing 30.15% CaO. The mean result of four analyses was 30.26% CaO, with a standard deviation of 0.085%. By pooling data from several analyses, it was established that s = 0.094% CaO.a. Do the data indicate the presence of a systematic error at the 95% confidence level?b. Do the data indicate the presence of systematic error at the 95% confidence level if no pooled value for s was available?A5.12-g pesticide sample was decomposed and then dilute to 200-ml to determine its Cu2* contents. The analysis was completed by treating aliquots as indicated: Volume of sample, mL Volume of 3.82 ppm Cu2", mL Signal 50.0 0.00 0.512 50.0 4.00 0.844 a. Calculate the percentage of copper in the pesticide sample. b. What assumption did you make in calculating the concentration of copper in your sample?6. The concentration of caffeine in an energy soft drink was determined by standard addition using HPLC. The following procedure was used: a standard caffeine solution was prepared by adding 0.09850g of caffeine to 25.0 cm3 of water.A series of solutions were prepared by adding known volumes of the standard solution to the soft drink before diluting to 100 cm3. The volume of standard and the caffeine peak area are shown in the table: Energy Drink (cm3) Added caffeine Std (cm3) Peak area 15 0 965 15 5 1352 15 10 1739 15 15 2126 15 20 2513 Determine the concentration of caffeine in the soft drink as mg cm-3. A. 3.3 B. 2.3 C. 4.3 D. 7.3
- Table 1: Standardization Data Trial 1 Trial 2 O145504 Mass of KHP 04536 Initial burette reading 0.05ML 12.3 ML Final burette reading 12.8 a6.omL Volume of base used ר.12 13.2 mL Data Analysis: KH Cg Hg Da (MOIAR MASS 2041ag) 1. Calculate the molarity of base for each trial. You must use dimensional analysis – show all unit conversions (hint: start with grams of KHP used). Review the balanced equation for KHP and NaOH you wrote in Expt 11 part 1. (204.29 TRIAI 1: 0.4550g. Average: Trial 2: Trial 1: with 1875 mL of your base (use the averageThe researcher extracts a sample of well water and prepares it for TXRF analysis with a 10.00 mg/L V internal standard, like the calibration standards. The result produces SCa = 69297.81 and SV = 13481.2.Determine the concentration of Ca.P TrueVision HD blackboard.uob.edu.bh/ultra/courses/ 19902 1/outline/assessment/ 452605 1/overview/e 1768814 1?cou Voitmeter e e salt bridge Fe KCI Cu FeSO4 CUSO,
- 1. You wish to determine the %concentration of a stock solution of brilliant blue FCF (MW=792.8grams/mole; extinction coefficient25=97000M'cm'). You make a 1:50 dilution of stock and then you take lul from your 1:50 dilution and dilute up to 1ml in a 1cm diameter cuvette. You obtain an A625=0.1. What is your total dilution factor? What is the % concentration of the dye in the original stock?ASSAY Calibration solutions Calibration solutions of naproxen in the range 5 – 25 μg/mL were prepared. Sample preparation 20 tablets weighing 12.3819 g were crushed to a fine powder. A portion of the powder (145.4 mg) was shaken with approximately 150 mL of acetic acid (0.05 M) for 5 min and then made up to volume in a 250 mL volumetric flask (stock solution). Approximately 50 mL of the stock solution was filtered and a 25 mL aliquot was diluted to 100 mL in a volumetric flask. 10 mL of the resulting solution was further diluted to 100 mL with acetic acid (0.05 M). Analysis The standards and sample solutions were analyzed by HPLC under the following conditions: Column: octadecylsilyl (ODS), 4.6 mmx150 mm, mobile phase: acetonitrile : 0.05 M acetic acid (85:15), flow rate: 1 ml/min, UV detection at 243 nm. Results: A calibration curve of concentration versus peak area was constructed for the standard solutions and gave the straight-line equation: y = 3555.6x + 85, r = 0.9999 The area…A 0.0200 gram blood sample was decomposed by a microwave digestion technique followed by dilution to 100.0 mL in a volumetric flask. Aliquots of the sample solution were treated with a lead complexing reagent and water as follows: Solution 1: 10.0 ml blood sample + 20.0 mL complexing agent + 30.0 mL H20. Solution 2: 10.0 ml blood sample + 20.0 mL complexing agent + 26.0 mL H20 + 4.00 mL of 78 ppb Pb2+ standard. The resulting solutions were analyzed by UV/Vis at 375 nm. Absorbance for solution 1 = 0.155 and for solution 2 = 0.216. Calculate the concentration of lead (ppb) in the original sample.