5.00 mL aqueous sample containing hydrogen peroxide was diluted to 25 mL and analyzed by titration with permanganate: 2MnO4- + 5H2O2 + 6H+ → 5O2 + 2Mn2+ + 8H2O The sample required 42.8 mL of 0.0175 M permanganate to reach the end point. What is the concentration of hydrogen peroxide in the original sample

Q: The Kjeldahl method was used to determine the nitrogen content of a soil sample. 25 g soil sample…

A: Mass of soil sample = 25 g Molarity of HCl = 0.05 M Volume of acid added = 10 mL Molarity of NaOH =…

Q: A 4.932-g sample of a petroleum product was burned in a tube furnace, and the SO2 produced was…

A: The reaction is given as: SO2(g)+H2O2→H2SO4 There is a reaction taking place between NaOH, H2SO4 and…

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A:

Q: A 4.912-g sample of a petroleum product was burned in a tube furnace, and the SO 2 produced was…

A: The number of moles of excess base is equal to the number of moles of HCl used for back titration.…

Q: Brass is an alloy consisting mainly of copper and zinc. To determine the percentage of copper in a…

A: A numerical problem based on extraction of metal from alloy, which is to be accomplished.

Q: A student wanted to determine the percent of NaOCI in a commercial bleaching solution. He diluted…

A: Given data, Mass of bleach = 5.0g Volume of flask = 100mL=0.1L Volume of sample = 25mL=0.025L…

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A:

Q: 400 mg of a butter sample was heated and some water was added. After shaking and filtration 10 ml…

A: Mass percent of NaCl can be calculated as given below.

Q: ou are given a sulfuric acid solution of unknown concentration.  You dispense 10.00 mL of the…

A: Titration is one of the most common method of qualitative analysis of substances given. It is done…

Q: The tetraethyl lead Pb(C2H5)4 in a 25.00 mL sample of aviation gasoline was shaken with 15.00 mL of…

A: Calculate the initial number of moles of iodine. n = C × VnI2 = CI2 × VI2nI2 = 0.02179 M × 0.015…

Q: 1. A student measured the amount of dissolved oxygen in river water sample using Winkler titration…

A: Answer:- this question is answered by using the simple concept of stoichiometry which relationship…

Q: 20 mL of a mixture of ferrous sulfate (FeSO4) and ferric sulfate Fe₂(SO4)3 was titrated with 6.5 mL…

A: In this process at first the permanganate consumed will be for only Fe2+. All Fe3+ will be…

Q: Titration of 0.2342 g of pure Na,C,O, (134.0 g/mol) required 13.45 ml of KMNO, solution according to…

A: 1- First calculate the moles of C2O42- ion :  moles = [ mass / molar mass ]  moles = [ 0.2342g /…

Q: 3) 2.413 g sample contains Na CO, NaHCO and inert material. This sample was solved in water and…

A: For Phenophthalien indicator (meq ) NaHCO3 = (meq ) of HCl M1 × 80 = 6.13 × 0.09644 M1  = 0.0073897…

Q: 3) 2.413 g sample contains Na CO̟, NaHCO and inert material. This sample was solved in water and…

A: Given, Amount of a mixture of Na2CO3, NaHCO3 and inner material = 2.413 g. Volume of the solution =…

Q: 1) In the standardization of a sodium hydroxide (NaOH) solution, 1.0211g of potassium biphthalate…

A: Primary Standard - It is a solution which is accurate and does not need to be calibrated for further…

Q: Mass of KxFe(C2O4)y · zH2O : 4.70 g Mass of sample : 0.175 g Mass of FeCl3 used in preparation :…

A: Mass of KxFe(C2O4)y · zH2O : 4.70 g Mass of sample : 0.175 g Mass of FeCl3 used in preparation :…

Q: Potassium permanganate solutions may be standardized by titrating against primary standard sodium…

A: Mass of Na2C2O4 = 0.2168g  Molar mass of Na2C2O4 = 134g/mol  Moles of Na2C2O4 = 0.2168g÷134g/mol =…

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A: The question is based on the concept of quantitative analysis. we have to quantitatively estimate…

Q: 7. A 0.4021-g sample of a purified organic acid was dissolved in water and titrated…

A: Here we have to determine the molecular mass of organic acid if 0.4021 g of sample of purified…

Q: A 0.9600 M NaOH solution was diluted with a factor of 4. Then the diluted solution of NaOH was…

A: In order to find whether the given acid is monoprotic, diprotic  or triprotic we first write down…

Q: A 0.9600 M NaOH solution was diluted with a factor of 4. Then the diluted solution of NaOH was…

A:

Q: A 0.4108-g sample of primary-standard Na2 CO3 was treated with 46.50 mL of dilute perchloric acid.…

A:

Q: The following solutions are needed to be prepared for the titration procedure: 1. 20 mL of 2 M HCl…

A: Given: Mass of Fe(OH)n used = 1.0867 g Volume of HCl solution used = 20 mL = 0.020 L…

Q: 1. (a) The solubility product of a sparingly soluble salt, XF2, was determined by titration and…

A: General titration equation is  M1V1=M2V2  M-> MolarityV->Volume in this question the titre is…

Q: A 50.00 mL sample containing La3+ was titrated with sodium oxalate to precipitate La,(C204)3, which…

A: Molarity is defined as “the mole of the solute per unit volume of the solution”. It is represented…

Q: concentration

A:

Q: A 0.3147-g sample of a primary-standard grade Na2C2O4 was dissolved in dilute H2SO4 and titrated…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: A 0.1824-g sample that contains both NaCl (MW= 58.442) and NaBr (MW= 102.89) is titrated with 0.1052…

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Q: 1. A 20.00-mL sample of aqueous oxalic acid, H2C204, was titrated with a 0.09113-M solution of…

A: By stoichiometry of reaction: moles of oxalic acid reactedmoles of MnO4- reacted=52=2.5  M1×V1 = 2.5…

Q: 05 ± 2.0e-4 (Analytical Balance) Total volume of Sample Stock, mL: 75 ± 0

A: For phenolphthalein Endpoint Using the molarity  equation; M1V1 (for Hcl)=M2 V2 (Noda Ash)(5.05×10-2…

Q: The concentration of ammonia in a commercial cleanser was determined. 25.00 ml of the cleanser was…

A:

Q: The Borax solution (Na2B4O7) was standardized by titrating 20.00 mL of sample with 1.044 M solution…

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Q: A 0.9600 M NaOH solution was diluted with a factor of 4. Then the diluted solution of NaOH was…

A:

Q: molar concentration of the acid

A:

Q: A 25.0mL acetic acid sample was titrated using exactly 69.72 mL of a 0.30M sodium hydroxide solution…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: 1. A student dissolves 2.006 g of FeSO4 7 H₂O in 40 mL of sulfuric acid and then dilutes it to…

A: #Q.1: Given the mass of FeSO4.7H2O initially taken to prepare the solution = 2.006 g  The volume of…

Q: A sample of solid Ca(OH)2 was stirred in water at a certain temperature until the solution contained…

A:

Q: To determine the concentration of an EDTA solution, the following zinc(II) solution is prepared:…

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Q: What volume in mL of 0.38 M HBr solution is required to titrate 125mL of a 0.18 M Ca(OH)2 solution?…

A: Molarity of Ca(OH)2 = 0.18M The volume of solution = 125 ml = 0.125 lt No of moles can be calculated…

Q: The data ( Concentration HCl =0.35 M, Volume HCl=24.35 mL, Volume NaOH=36.44 mL) refers to a…

A: Concentration HCl =0.35 M = 0.35 mol/L Volume of HCl =  24.35 mL = 0.02435 L Volume NaOH = 36.44 mL…

Q: (b) An impure sample of (COOH)2.2H2O that had a mass of 1.00 g was dissolved in water and titrated…

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Q: A 20.00-mL sample of aqueous oxalic acid, H2C2O4, was titrated with a 0.09113-M solution of…

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Q: The Borax solution (Na2B4O7) was standardized by titrating 20.00 mL of sample with 1.044 M solution…

A:

Q: Iro

A: (a) This step is performed to dissolve any impurity present in the precipitate and to make sure to…

Q: What volume in mL of 0.45 M HBr solution is required to titrate 125mL of a 0.21 M Ca(OH)2 solution?

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Q: An unknown 32.7 % v/v reagent has a density of 1.773 g/mL. To determine the identity of this base, a…

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Precipitation Titration

Precipitation analysis is used to analyze drugs, and to measure the salt content in food and beverages. It is an important concept from the examination point of view many practical questions are asked on the topic. This topic is significant in the professional exams for both undergraduate and graduate courses, especially for