All arsenic in the mineral containing 20 g of arsenic is dissolved by converting it into As3+. Calculate the percentage of arsenic in the mineral since the solution is titrated with 43.8 mL of decinormal KBrO3 solution.

Q: 0.683 grams of iron mineral dissolves with acid. Fe2+ ​​is titrated with Ce(SO4)2 solution.…

A: Answer is explained below.

Q: A sample consisting of Na2CO3, NaOH and inert matter weighs 1.179 grams. It is titrated with 0.3 N…

A:

Q: A 0.1285-g sample of impure Na2CO3 was dissolved in 20.00 mL of 0.2034 M HCl. The excess HCl was…

A: We will first find out the actual mass of Na2CO3 present in the sample by calculating the moles of…

Q: Twenty tablets of an iron food supplement whose total mass was 22.131 g were crushed and perfectly…

A: Answer: This question is based on the relation between mass, molar mass and number of moles and by…

Q: 1. A sample containing magnetite, Fe;O4, was analyzed by dissolving a 1.5419-g sample in…

A: Amount of Ore obtained Fe=0.8525g Reaction involved  Fe3O4 + 8HCl ----------   Fe+2+2Fe+3 4Fe3O4  +…

Q: The protein content of wheat flour can be determined reasonably accurately by multiplying the…

A: Kjeldahl method is used for protein's quantitative analysis.

Q: A 1.250 g sample of cheese was subjected to a Kjeldahl analysis to determine the amount of protein.…

A: Given data,Mass of sample=1.250gMolarity of HCl=0.1050MVolume of HCl=50.0mL=0.050LMolarity of…

Q: To determine the amount of a hypothetical compound KHA · H2A 2H2O in a pure sample, Senku asked his…

A: The compound KHA.H2A.2H2A has a total of 3 protons(H+). Hence it is a triprotic acid. #(a): Given…

Q: 2. A sample consists of a mixture of Fe(NO3)2 (s) and Fe(NO3)3 (s) in unknown proportion. A total of…

A: 2. Sample mixture : FeNO32 + FeNO33Total 3.65 g of mixture was dissolved in phosphoric acid…

Q: A Ba(OH)2 solution is standardized against potassium hydrogen phthalate (KHP). The titration of…

A: Given: Mass of KHP used = 0.5781 g. Volume of Ba(OH)2 required = 30.50 mL = 0.03050 L…

Q: When 38.0 mL of 0.1250 M H2SO4 is added to 100. mL of a solution of PbBr2, a precipitate of PbSO4…

A: Mass of PbSO4 = 0.0471 g Molar mass of PbSO4 =303.28 g/mol Volume of PbBr2 = 100 mL

Q: A 6.221-g sample containing magnesium chloride and sodium chloride was dissolved in sufficient water…

A:

Q: A shipment of crude sodium carbonate must be assayed for its Na2CO3 con- tent. You receive a small…

A:

Q: The lead in a 0.2000-g sample is precipitated as PbCrO4. The precipitate is filtered, washed, and…

A: The balanced equations are Pb2+ + 2 CrO42– --------> PbCrO4 (s) 2 PbCrO4 + 2 H+ -------> 2…

Q: A 50.0 mL solution of Ca(OH)₂ with an unknown concentration was titrated with 0.340 M HNO3. To reach…

A:

Q: The calcium in a 200.0 mL sample of natural water was determined by precipitating the cation as…

A: The mass of empty crucible is = 26.6002 g The mass of crucible and CaO is = 26.7134 g The mass of…

Q: A 50.0 mL solution of Ca(OH)2 with an unknown concentration was titrated with 0.340 M HNO3. to reach…

A:

Q: The percentage of CaCO3 in a sample of finely powdered limestone was determined. In the laboratory,…

A: Analyte is a substance or chemical compound that is interesting of a procedure.  In a simple words…

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: How many moles of Ba(OH)2 are present in 225 mL of 0.200 mol L Ba(OH)2?

A: Given :-  concentration of Ba(OH)2 solution = 0.200 mol.L-1  volume of Ba(OH)2 solution = 225 mL…

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 (40.078 g/mol) in a 500.0 mL sample of natural water was determined by precipitating the…

A: Molar concentration is measure of concentration of chemical species, in particular of a solute in a…

Q: A 0.750 g sample of finely ground limestone was placed in an Erlenmeyer flask, and 25.00 ml of 1.00…

A: Mass of sample = 0.750 g Initial molarity of HCl = 1 M Initial volume of HCl = 25 mL or 0.025 L…

Q: 1.250 g sample of cheese was subjected to a Kjeldahl analysis to determine the amount of protein.…

A: Mass of sample = 1.250 gm  Molarity of HCl = 0.1050 M  Volume of HCl = 50 ml  Molarity of NaOH =…

Q: A precipitate of AgCl + AgBr weighs 0.8132 gram. On heating in a current of chlorine, the AgBr is…

A: Atomic Mass of Br - 79.904 u Atomic Mass of Cl - 35.5 u Molar mass of AgCl - 143.32 g/mol Molar mass…

Q: The amount of protein in a sample of cheese was determined by a Kjeldahl analysis. After digesting a…

A: Given , Mass of sample cheese = 0.9814 g

Q: A 1.250 g sample of cheese was subjected to a Kjeldahl analysis to determine the amount of protein.…

A: Kjeldahl analysis

Q: 0.683 grams of iron mineral dissolves with acid. Fe2+ is titrated with Ce(SO4)2 solution. Calculate…

A: the redox reaction is given below: Fe2+ + Ce4+ = Fe3+ + Ce3+ Working formula Volume…

Q: A Fajans titration of a 0.7908-g sample required 45.32 mL of 0.1046 M AgNO3. Express the results of…

A: Step : 1            Express the results of this analysis in terms of the percentage of BaCl2·H2O.

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 50.0 mL solution of Ca(OH)2 with an unknown concentration was titrated with 0.340 M HNO3. To reach…

A:

Q: A 1.250 g sample of cheese was subjected to a Kjeldahl analysis to determine the amount of protein.…

A: As per our guidelines, we are supposed to answer only one question. Kindly repost the other question…

Q: silver nitrate solution contains 7.053 of primary standard AgNO3 in 500.0 mL . What volume of this…

A: Balanced chemical equation along with the required calculations have been given in the following…