In the acetic acid determination in vinegar experiment; NaOH was standardized with 0.35 g KHP (molar mass = 204.22 g/mol). The KHP was dissolved in 75.0 mL distilled water in a 250 mL Erlenmeyer flask and titrated to the endpoint colour by dispensing 11.40 mL of NaOH from the burette. Calculate the molarity of NaOH. O a. 0.10 M b. 0.15 M c. 0.20 M d. 0.35 M e. 0.25 M
Q: Examine the impact of the following circumstance on the PURITY of the sample. Decide whether the…
A: EDTA is ethylenediaminetetraacetic acid which is an indicator. It has 2 amino and 4 carboxyl groups.…
Q: arefully weighed 280mg Calcium carbonate was used in the standardization of an EDTA solution.…
A: Millimoles of a component is calculated by - concentration (mol/L or M) × volume used (mL). While…
Q: Compare and contrast an anticipatory standard to a reactionary standard by listing and describing…
A: In sole proprietorship type of business organization, you would be fully responsible for all debts…
Q: A 0.3045 g of CaCO3 primary standard was dissolved using concentrated HCl, evaporated to incipient…
A: Solution -
Q: A foot powder sample containing Zn was dissolved on 50.00 mL water and was titrated to the end point…
A:
Q: A CaCO3 solution that will be used to standardize EDTA was prepared by dissolving 3.1251 g of solid…
A: This classical method of determination of Hardness of water by titration of Standard and unknown…
Q: What is the result of the Analytical Method Validation of 0.1 N H2SO4 Standardization? Given: 50…
A: Introduction: Titration is the process of finding an unknown concentration of solution by using the…
Q: A 0.3045 g of CaCO3 primary standard was dissolved using concentrated HCl, evaporated to incipient…
A:
Q: You are given a 200-mL sample of surface water from Lake Ontario, and asked to determine the…
A: Given, Volume of water sample = 200mL Volume of K2Cr2O7 = 0.2M Volume of K2Cr2O7 = 15.0 mL Time of…
Q: What is the Qsp when 61.0 mL of 1.50 ✕ 10-4 M AgNO3 are mixed with 80.0 mL of 5.20 ✕ 10-3 M CaCl2?…
A:
Q: A 20-mL solution of 0.0659 M AgNO3 was titrated with 20 mL of 0.0509 M NaCl (Ksp = 1.8x10-10).…
A: 20 mL of 0.0659 M AgNO3 solution was titrated with 20 mL of 0.0509 M NaCl solution .The Ksp is…
Q: A foot powder sample containing Zn was dissolved on 100.00 mL water and was titrated to the end…
A: The question is based on the concept of complexometric titrations. We have to calculate pZn value.
Q: A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate proteins. After…
A:
Q: Five white, 500-mg uncoated ascorbic acid (AA) tablets with an average weight of 0.6100-g were…
A: To calculate the amount of ascorbic acid present in a uncoated ascorbic acid tablet having an…
Q: A CaCO3 solution that will be used to standardize EDTA was prepared by dissolving 3.1251 g of solid…
A: Given data; Mass of solid CaCO3 is 3.1251 g The volume of dilute HCl for prepare CaCO3 solution is…
Q: 6. A mixture that weighed 1.0105 g may contain NaOH, Na,CO; and NaHCO. It was dissolved in 100 mL of…
A: A question based on solutions that is to be accomplished.
Q: . A 1.2-gram sample of lanolin was treated with Wij’s solution and excess potassium iodide solution.…
A: GIVEN- Mass of lanolin sample(W)=1.2g Normality of sodium thiosulfate solution=0.1N Volume of…
Q: A solution of Ba(OH)2 was standardized against0.1215 g of primary-standard-grade benzoic acid,…
A:
Q: Calculate the gravimetric factor of the following. 2 Fe3O4 is sought(Analyte), 3 Fe2O3 is weighed…
A: Given, Sought : Fe3O4 Precipitate : Fe2O3
Q: A 2.0 g of MgCO3 was dissolved and diluted to exactly 500-mL volumetric flask. If 50-mL aliquot was…
A: Mass of MgCO3 = 2g Mol. Mass of MgCO3 = 84g/mol Volume of dilution = 500ml Volume of aliquot = 50ml…
Q: mixing 200 mL of 0.450 M KCl and 350 mL of 0.200 M K2SO4. Discuss your results. B: At 25°C, what is…
A: A) Use molarity= mole×volume All the information is given
Q: Compute for the molar concentration of EDTA standardized using 50.00 mL of the CaCO3 primary…
A: EDTA complexometric titration is based on the fact that many metallic ions form stable complexes…
Q: To determine the Ksp of barium oxalate at 12°C, a 100.0 mL saturated solution was prepared by adding…
A: Here 100 ml of saturated solution of BaSO4 is prepared and 10 ml aliquot of solution required 10.7…
Q: Calculate the gravimetric factor of the following. 2 Fe is sought(Analyte), 1Fe2O3 is weighed…
A: According to the formula, GF =n (FW substance sought)m (FW substance weight)
Q: A foot powder sample containing Zn was dissolved on 50.00 mL water and was titrated to the end point…
A:
Q: A CaCO3 solution that will be used to standardize EDTA was prepared by dissolving 3.1251 g of solid…
A: Given data contains, Mass of solid CaCO3 is 3.1251g. Volume of dilute hydrochloric acid for…
Q: A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate proteins. After…
A: Given : 1.Absorbance of standard solution(A1) = 0.396 (first point) 2.Absorbance of…
Q: 10.) A 0.6025 g sample was dissolved and the Ca 2+ and Ba 2+ ions present were precipitated as…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: A 5.00 ml sample of white vinegar is diluted in acetone and analyzed by GC-TCD using 1-propanol as…
A: Given options,
Q: In how much volume of diluted sulfuric acid should you dissolve a multivitamin tablet of…
A: Given, Volume of KIO3 = 25.0 mL = 0.025 L Molarity of KIO3 = 0.01M Volume of thiosulfate = 10 mL =…
Q: In the acetic acid determination in vinegar experiment; NaOH was standardized with 0.35 g KHP (molar…
A: Given : Molar mass of KHP=204.22 g/mol Mass of KHP=0.35 g Volume of distilled water=250 ml Volume of…
Q: A protein of molecular weight = 55,000 g/mol and at 1 mg/mL concentration was titrated with Ellman’s…
A:
Q: The ethyl acetate concentration in an alcoholic solution was determined by diluting a 10.00-mL…
A:
Q: Which of the following would result in an increase in the calculated ngas 10, assuming the rest of…
A: The correct option is:
Q: A 0.3045 g of CaCO3 primary standard was dissolved using concentrated HCl, evaporated to incipient…
A: Given, 0.3045 g of CaCO3 dissolved in concentrated HCl Dilute to 250 mL Molar mass of CaCO3 =…
Q: Calculate the AH° of the borate dissolution at 25°C in kJ mol1, if the 22.12 mL of 0.025 M HCI…
A: Solution- Given data- T= 250C =298K ∆S0 = 61.14 J mol-1 K-1, gas constant = 8.314 J mol-1 K-1
Q: Calculate the mass percent of the ascorbic acid in the same show full solution Situation: The…
A: A numerical problem based on acid-base titration that is to be accomplished.
Q: The ethyl acetate (CH3COOC2H5) concentration in an alcoholic solution was determined by diluting a…
A: To find the %(w/v) of ethyl acetate first its hydrolysis done in potassium hydroxide base which…
Q: Mass solute needed to prepare 0.500L of 0.2 M NaCO3 from a solid NaCO3 with a purity of 92.0wt%
A: The total mass needed to prepare 0.500 L of 0.2 M NaCO3 is calculated as shown in equation (1) where…
Q: A 5.00 mL tap water sample was measured out with a volumetric pipette, and added to a 25 mL…
A:
Q: A 5.00 mL tap water sample was measured out with a volumetric pipette, and added to a 25 mL…
A: Given : Volume of tap water used = 5.00 mL Volume Na2EDTA.2H2O used = 0.635 mL Concentration of…
Q: A 5.00 mL sample of white vinegar is diluted in acetone and analyzed by GC-TCD using 1-propanol as…
A:
Q: The concentration of Cl– in a 300.0-mL sample of water drawn from a fresh water acquifer suffering…
A: The reaction between Cl- ion and Hg2+ ion produces a metal–ligand complex of HgCl2(aq). Each mole of…
Q: A 10.00 mL sample of alcoholic ethyl acetate was diluted to 100.00 mL. 20.00 mL was aliquoted and…
A: Answer: These questions are based on the stoichiometric calculation where moles of KOH will be…
Q: A 0.4020 g sample was dissolved, and Ca2+ and Ba2+ ions present were precipitated as Ba.C2O4.H2O and…
A:
Q: 3. In a preliminary experiment, a solution containing 0.083M X and 0.0666M S gave peak areas of A, =…
A: Given data: For solution: Ax = 423 As = 347 For the mixture: Ax = 553 As = 582
Q: Which of the following methods of preparing 0.0010M HCl solution from 1.0M stock HCl Solution will…
A: The task is to determine overall uncertainty while preparing 0.0010 M HCl solution from 1.0 M stock…
Q: Explain the meaning of the advantages of coulometry * No need to prepare, standardize, or store…
A: The coulometry method is for determining the quantity of a substance during an electrolysis reaction…
Q: In a reaction involving the iodination of acetone, the following volumes were used to make up the…
A: Here the mixture contains 5ml of 3.40M acetone, 10 ml of 1.50M HCl ,10 ml of 0.004M and 25 ml water.…
Q: Formula: ml base x N x meq. wt. x 100 %w/w = Sample weight A 4.59 ml sample of HCI, specific gravity…
A: 50.5ml of 0.9544N NaOH is required. HCl and NaOH reacts in 1:1 ratio. 4.59ml of sample was used…
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
- 1. What is the MW of the analyte?2. What is the meq of the analyte?3. What will be the weight (in grams) of the analyte if the standardization is to be quartered?4. What will be Normality of the solution if 7.5ml of the titrant was consumed in the standardization?5. What is the average Normality if two or more trials were conducted with the values of 0.102N and 0.105N?A sample of water from a river was analyzed by titrating a 125 mL aliquot with 0.0210 M EDTA, consuming 22.52 mL. Express the hardness of the water in ppm of CaCO3.A Medical Technology student was given a capsule of a multivitamins and she was asked to determine the % by mass (w/w) of ascorbic acid present in the capsule. The student analyzed the 2.001 g sample using volumetric titration. The following data was generated in the analysis: KIO3 + 5KI + 6H+ → 3I2 + 6K+ + 3H2O C6H8O6 + I2 → C6H6O6 + 2I- + 2H+ Table 1. Standardization of KIO3 Molarity of Ascorbic Acid Standard Solution 0.03542 M Volume of Ascorbic Acid 25.00 mL Volume of KIO3 8.70 mL Molarity of KIO3 ______________M Table 2. Determination of Ascorbic Acid Concnetration Initial burette reading, KIO3 0.00 mL Final burette reading, KIO3 33.60 mL Volume consumed, KIO3 33.60 mL MM of Ascorbic Acid 176.12 g/mole choices 7.30% 30.1% 33.6% 32.5%
- Five white, 500-mg uncoated ascorbic acid (AA) tablets with an average weight of 0.6100-g were pulverized in a mortar. A sample of the powdered ascorbic acid weighing 0.4610-g was placed in an iodine flask and was dissolved in 50-mL H2SO4 then 5-g of KBr was added to the resulting solution. The solution was titrated with 46.73-mL of 0.0152 M STD. KBrO3 to reach a faint yellow endpoint then 3-g KI and 5-mL Starch TS. The blue color solution is then titrated with 2.78-mL of 0.1047 M STD. Na2S2O3 to reach the disappearance of the blue iodostarch complex. MW: KBrO3 = 167.0 ; KIO3 = 214.0 ; Na2S2O3 = 158.11 ; C6H8O6 = 176.12 Compute the milligrams of pure AA per tablet from the assay. None of the choices 349.7 mg 264.3 mg 462.7 mgConsider the titration illustrated in Figure 8.] Anhydrous sodium carbonate (Na₂CO₃) is a primary standard. When 0.364 grams of the substance is placed in a conical flask, then 20.00 cm³ of sulphuric acid (H₂SO₄) solution is required to reach the end point of the titration. What is the concentration in mol·dm⁻³ of the sulphuric acid solution? [Give the answer to 3 decimal places. Do not type in the unit. Use a decimal point.] *A 2.0 g of MgCO3 was dissolved and diluted to exactly 500-mL volumetric flask. If 50-mL aliquot was used in the analysis, what is the weight of MgCO3 present in the aliquot sample
- A STOCK SOLUTION containing 0.1581 g/L K2CrO4 was prepared.In order to make the CALIBRATION STANDARD, 5 ml of the STOCK was transferredinto a 50ml volumetric flask and then diluted with an appropriate solvent.Calculate:(a) The ppm of K2CrO4 in the CALIBRATION STANDARD.(b) The molarity of K2CrO4 in the CALIBRATION STANDARD. (c) Calculate the molar absorptivity of K2CrO4 (at 371.0 nm). Assume that Beer's Law isobeyed over this concentration range.At 371.0 nm, this CALIBRATION STANDARD in a cell of path length 1.00 cm gave a %T of 59.752.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+ Is this an example of total analysis technique or concentration technique? Explain.The solubility of borax, which is made up of sodium tetraborate (Na2B4O5(OH)4 8H2O), was analyzed. The dissolution of borax is: Na2B4O5(OH)4 • 8H2O(s) ⇌ 2 Na+(aq) + B4O5(OH)42–(aq) + 8 H2O(l) A 50 mL saturated solution was prepared. After filtration of solution, 5 mL aliquot was transferred to a flask and titrated using 0.432 M HCl. The endpoint was found to be 4.73 mL of the titrant. Tetraborate anion (B4O5(OH)42-) is a weak base which reacts with HCl like the following reaction: B4O5(OH)42–(aq) + 2 H+(aq) + 3 H2O(l) ⇌ 4 H3BO3(aq) What is Ksp expression for the dissolution? What is the tetraborate ions concentration in the filtrate? What is the molar solubility and Ksp of borax if the titration was done at room temperature (298 K)?
- A 0.1093-g sample of impure Na2CO3( Molecular weight 106) was analyzed by the Volhard method. After adding 50.00 mL of 0.06911 M AGN03 (Molecular weight 169.87), the sample was back titrated with 0.05781 M KSCN, requiring 27.36 mL to reach the end point. Report the purity of the Na2CO3 sample.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.The buret was filled with 0.100 M HCl solution. Then was transferred in a 25.0 mL of saturated calcium hydroxide solution (2g of calcium hydroxide per 100 ml of water) in two separate E-flasks. Then 2 drops of phenolphthalein was added to each flask Titration data for the determination of solubility and Ksp of calcium hydroxide: Trial 2: Final Buret reading (ml)-26.10; Initial Buret reading (ml)- 19.80; Temperature (Celcius)- 25 Voume of HCl used: Trial 2- 6.30mL 1. Compute for the moles of H+ used and the moles of OH- present. moles of H+ used = (concentration of HCl) × (volume of HCl used)moles of OH- = moles of H+ used 2. Construct an ICE table for the reaction.3. Calculate the molar solubility (in mol/L) of OH- and Ca2+.4. Determine the solubility of Ca(OH)2 in g/L. (MM of Ca(OH)2 = 74.096 g/mol). 5. Calculate the Ksp of Ca(OH)26. Compute for the percent error of the experimental value for Ksp of Ca(OH)2 with the literature…