A o.9325-g sample of a wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00 mL of o.o5063 M HCl; a 7:73-mL back-titration with 0.04829 M NaOH was required. Calculate the percentage of protein in the flour.

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

Q: In a titration experiment based upon the reaction shown below, 25.49 mL of an acidified Fe2+…

A:

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 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: In the analysis of a sample for KH2PO4 content, a sample weighing 0.3994 g required 18.28 mL of…

A: Given - Mass of sample = 0.3994 g Volume of KOH solution = 18.28 mL Concentration of KOH solution =…

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

A: Given, Volume of calcium hydroxide  = 87.5mL Molarity of HBr = 0.0892 M Volume of HBr = 68.7 mL

Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs…

A: The balanced chemical reaction is given as: H2C2O4 (s) + 2 NaOH (aq) → Na2C2O4 (aq) + 2 H2O (l)

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: For a tablet containing 1000 mg of vitamin C, calculate the minimum concentration of the NaOH…

A: Given that :  Mass of vitamin C = 1000mg = 1000mg×1g/1000mg = 1.00g Volume of NaOH used to…

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A:

Q: What is the percentage concentration of a 1:10,000 solution of epinephrine HCl (MW 219.20)? (b) If…

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Q: A student weighs out 1.051 g of impure KHP, dissolves the sample in deionized water and titrates it…

A: Given data Mass of impure KHP = 1.051 g Molarity of NaOH  solution = 0.1101 M Volume of NaOH…

Q: (5) A student weighed a sample of KHP and found it weighed 1.276 g. After titration with NaOH, 19.84…

A: KHP is a monoprotic acid whose chemical formula is KHC8H8O4 and NaOH is a monoprotic base. It…

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

A:

Q: A 0.08 M sodium hydrOxide solution was prepared and titrated against 25 mL of 0.11 M formic acid,…

A: It is an neutralization titration . 17 ml of 0.08 M NaOH has been added to 25 ml 0.11 M formic acid.

Q: 5. What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with…

A: Molarity of a solution is equal to the number of solute present in one litre of solution. Write the…

Q: concentration

A:

Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs…

A: The given data is as follows: The mass of oxalic acid = 204 mg = 0.204 g The volume of water = 250…

Q: All arsenic in the mineral containing 20 g of arsenic is dissolved by converting it into As3+.…

A: Working formula Decinormal = one tenth of normality = 0.1 N Normality = Molarity*no of equivalents…

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: How many grams of KMnO4 are required to prepare 4.000 L  of 0.0350 M  KMnO4 solution that is used in…

A: Calculation of no. of mol of KMnO4: Calculation of amount of KMnO4:

Q: What volume of 0,955 mol·dm–3 HCl solution (in mL or cm3), is required to titrate 2,152 g of Na2CO3…

A:

Q: A sample of CaCO3 (molar mass=100.1) weighing 0.4856 g is dissolved in HCl and the solution diluted…

A: Given: Molar mass of CaCO3 = 100.1 g/molMass of CaCO3 = 0.4856 gVolume of EDTA = 21.37 mLVolume of…

Q: A Na2CO3 standard solution is prepared by transferring 2.4817 grams of primary standard-grade sodium…

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

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Q: 2.413 g sample contains Na2CO3, NaHCO3 and inert material. This sample was solved in water and…

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Q: chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out…

A: Given-> Weight of oxalic acid = 54 mg = 0.054 gm  (1 gm = 1000 mg) Volume of oxalic acid solution…

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A:

Q: 1. A 0.4126-g sample of primary-standard Na2CO3 was treated with 40.00 mL of dilute perchloric acid.…

A: Given:-           Mole of  Na2CO3 = 0.4126 g/106 gmol = 3.89 mmol Mole of HClO4 neutralize required…

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

A:

Q: Calculate the percent purity of a sample of Mg(OH)2 if titration of 2.568 g of the sample required…

A: The percent purity is given by

Q: 2.413 g sample contains Na2CO3, NaHCO3 and inert material. This sample was solved in water and…

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Q: What is the percentage purity of sodium hydroxide pellets, 1.0056 g of which was titrated with 21.5…

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Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs…

A:

Q: 7. A 1.50 ml sample of sulfuric acid solution from a car storage battery is titrated with 1.47M…

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Q: 2.4414 g sample containing KCI, K,SO, and inert materials was dissolved in sufficient water to give…

A: Hi there! Since you have posted multiple questions, we will answer the first question for you.

Q: The titration of 0.314 g of potassium hydrogen phthalate (KHP) requires 13.16 mL of a NaOH solution.…

A: we need to calculate moles of NaOH for the titration of 0.314 g of KHP

Q: A 25.00 mL sample of a vinegar solution is diluted to 250.00 mL with water. Then a 25.00 mL aliquot…

A: Molarity of NaOH = 0.1027 M Volume of NaOH = 22.13 mL Volume of Vinergar = 25 mL

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

A:

Q: A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs…

A:

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: You have identified by titration that a 1.78g sample of bleach contained 90.2mg of NaOCl. What is…

A: Mass percent is the ratio of mass of NaOCl to the mass of sample

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: 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 solution was prepared by dissolving 5.76 g of KCI .MgCl2. 6H2O (277.761 g/mol) in sufficient water…

A: GivenAmount of KCl.MgCl2.6H2O = 5.76 gMolar Mass of KCl.MgCl2.6H2O = 277.761 g/molVolume of solution…

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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 =…