In the determination of iron in limonite, 0.5166 g of mineral is dissolved in acid and Fe2 + is titrated with 42.96 ml 0.0213 M Na2Cr2O7. Calculate the percentage of iron in limonite. (Ma (Fe): 56 g / mol) A. 28.36 B. 31.89 C. 59.51 D. 64.25

Q: In a titration of HNO₃, you add a few drops of phenol-phthalein indicator to 50.00 mL of acid in a…

A: The total volume of acid we have taken to finally reach the endpoint = 50 + 30 = 80 mL And the total…

Q: 4. A 2.00 g sample of an iron ore is dissolved in acid and then reduced to Fe²+. It was then…

A: Given data:  Mass of iron ore = 2.00g Molarity of KMnO4 = 0.025M Volume used = 47.5 mL Molar mass of…

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: The amount of protein in a sample of cheese is determined by a Kjeldahl analysis for nitrogen. After…

A: Here we have to determine the mass percentage of protein present in sample of cheese in the…

Q: A solution containing KCI (74.551 g/mol) is analyzed by the Mohr Method. A 0.8312-g sample is…

A: The volume of AgNO3 required by the sample is 27.99 mL The volume of titrant required to reach the…

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

A: Solution: We know Kjeldahl method is used to determine the nitrogen content of the any sample.…

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: Number of moles = mass/molar mass  Molarity = number of moles/volume of solution (in L)

Q: A 50.00-ML water sample was titrated with 0.0250 M EDTA to determine its calcium content. The…

A: The question can be solved using the law of equivalence. The detailed solution is shown below.

Q: A 1.047 g sample of canned tuna was analyzed by the Kjeldahl method; 24.61 ml. of 0.1180 M HCl were…

A: Kjeldahl's method :-  The percentage of nitrogen in Kjeldahl's method is given by the formula  %N =…

Q: Use the equation below to calculate the following: 3Ca(NO3)2(aq) + 2Na3PO4(aq) --> Ca3(PO4)2(s) +…

A: (d) Given,             From the balanced equation 3 moles of Ca (NO3)2 reacts with 2 moles of…

Q: A 30 ml solution of I- was treated with 50 ml of 0.365 M AgNO3. The resulting AgI precipitate was…

A: Given: Amount of I- = 30 ml AgNO3 50 ml ( 0.05 L) & 0.365 M Filtrate titrate with 37.60 ml (…

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: 0.300 g of a nitrogen-containing sample is analyzed by the Kjeldahl method and the released ammonia…

A: The Kjeldahl method is a method for the quantitative determination of nitrogen contained in organic…

Q: For the determination of Ca in blood serum, 5 mL of a serum sample is taken and the Ca2 + in it is…

A:

Q: An AGNO3 solution with NaCI equivalent of 5,972 mg / ml is used as a titrant in volumetric analysis.…

A: The question is based on concept of volumetric titration. It involves estimation of Chloride in the…

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: Use the following atomic masses (in g/mol): Mg = 24.31; O = 16; Ca = 40.08; C = 12.01; Na = 23; H =…

A:

Q: In order to calculate the volume of an irregularly shaped container, a chemist added 108.2 g of NaCl…

A: First of all, you need to find the molarity of NaCl solution present in the container. Once you get…

Q: Calculate the weight of pure sodium carbonate that is necessary to prepare 2.806  L of 0.223  N…

A: We need to find molarity of the solution . We assume molar mass of sodium-carbonate in 106 g/mol,…

Q: 1. (10) The amount of protein in a sample of cheese can be determined by Kjeldahl analysis for…

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

Q: Fe in ore can be analyzed by oxidizing Fe to Fe2+ then titrating  Fe2+with K2Cr2O7  .  See equation…

A: Stoichiometry of  Analyte  Titrant

Q: A 1.223 g sample containing arsenic (As) was converted to H3ASO4 by suitable treatment. 40.00 mL of…

A: Given : Initial sample = 1.223 g Volume of AgNO3 = 40.00 ml Molarity of AgNO3 =0.07891 M  Molarity…

Q: 4.0050 g sample of chlorinated lime was mixed with enough water to make 1000 mL. A 100 mL sx of the…

A: Find the availble chlorine content of chloronated lime

Q: If a 1.25 g sample of magnesium oxide (98.9%) were titrated with 70 ml of 104 N of sulfuric acid…

A:

Q: A 1.7483-g sample containing Al(NO:)s, AICI, and inert material was dissolved in acid and divided…

A: Percentage composition of a sample can be calculated using the molar mass of the compounds present…

Q: A 0.600 g sample containing arsenic (As) was converted to H3AS0, by suitable treatment. 40.00 mL of…

A:

Q: A solution containing 0.370 g the mineral Iron ( 55.84 g/mole) produced ferrate ion (Feo 4 -2 = Mw…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analyzed by dissolving the sample and…

A: A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analysed by dissolving the sample and…

Q: the calcium in a 5.00ml serum sample is precipitated as CaC2O4 with ammonium oxalate. the filtered…

A: Number of moles of KMnO4 , n = Molarity x volume in L                                              =…

Q: A permanganate solution is prepared by dissolving 20.0123 g KMNO4 in 500 mL of distilled water and…

A:

Q: A Kjeldahl procedure was used to analyze 356 μL of a solution containing 48.36 mg protein/mL. The…

A: Given concentration=48.36 mg protein/mL Molarity of HCl = 0.0336 M Volume of HCl = 5 mL = 5 x 10-3L…

Q: For items 44-47. The chloride ion content of a 250.0-mL seawater sample was titrated against 0.1102…

A: This question can be solved using law of multiple proportions.

Q: 50. The purity of sodium oxalate Na₂C₂O4 (134.00 g/mol) is determined by titrating with a standard…

A: Titration reaction is common quantitative lab method which used to determine the concentration of…

Q: The presence of soluble chromium compounds in wastewater is of great environmental concern. As part…

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Q: Titration of Acetic Acid CH3COOH 1) Record the exact Molarity of the freshly prepared solution of…

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Q: The protein in a 0.2976 -g sample of cheese is determined by the Kjeldahl method. The sample is…

A: Given that -  Mass of the sample = 0.2976 g  HCl Molarity = 0.09756 M  Also normality of HCl same as…

Q: A 0.4755-g sample containing (NH4)2C2O4 and inert materials was dissolved in water and strongly…

A: A question based on mole concept that is to be accomplished.

Q: A 0.2850 g sample of lye ( impure NaOH) was weighed out and dissolved in water, 44.54 mL of 0.150 N…

A: The given information is: Weight of sample of lye = 0.2850 g Volume of HCl = 44.54 ml Normality of…

Q: 87. What is the use of barium hydroxide in the precipitation of standard NaOH solution? a. catalyst…

A: Q. 87 Ans: (c) precipitate any carbonate present insolution. Barium hydroxide is used in titrations.…

Q: The amount of protein in a sample of cheese is determined by a Kjeldahl analysis  for nitrogen.…

A: Given data,Molarity of HCl=0.1047MVolume of HCl=50mL=0.050LMolarity of NaOH=0.1183MVolume of…

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

A: Whenver an acid and base reacts with each other than they form salt and water and the process is…

Q: A 0.6500 g sample of plant food preparation was analyzed for its N content by the Kjeldahl method,…

A: Mass of samples = 0.6500 g MHCl = 0.1058 M VHCl = 50 mL = 0.050 L MNaOH = 0.0850 M VNaOH = 11.80 mL…

Q: A 1.047 g sample of canned tuna was analyzed by the Kjeldahl method; 24.61 mL of 0.1180 M HCl were…

A: Given that ,  Mass of sample analyzed by Kjeldahl method = 1.047 g Liberated ammonia is titrated…

Q: NEUTRALIZATION From the previous lesson, you have learned that the Arrhenius theory defines…

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Q: A mined alloy sample weighing 2.0840 g is dissolved in minimal amounts of concentrated HNO3 before…

A: Here we have to determine the percentage of Ag present in alloy in the following volumetric…

Q: A permanganate solution is prepared by dissolving 20.0123 g KMNO4 in 500 mL of distilled water and…

A: Given: The reaction is as follows, 5H2C2O4+2MnO4-+6H+⇌10CO2+2Mn2++8H2O Molarity of oxalic acid =…

Q: As seen in the reaction below, the concentration of SO2 can be found by titration against a standard…

A:

Q: In one experiment, 0.2480 g sample of CaCO3 was dissolved in an acidic solution. The calcium was…

A: Given data,Mass of sample=0.2480gMass of CaC2O4.H2O=0.3084g