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suppose you have an unknown sample containing Fe^2+, and you
titrate it with KMnO4 standard solution....
A 1.026 g sample of an iron unknown requires 24.35 mL of 0.0195 M MOA solution...
A 1.026 g sample of an iron unknown requires 24.35 mL of 0.0195 M MOA solution to reach the end point. The atomic mass of Fe is 55.85 g/mol. Balanced equation: 5Fe2+ (aq) + MnO4 (aq) + 8H(aq) 5Fe(aq) + Mn(aq) + 4H2O) Which species aids in the dissolution of the compounds and helps to facilitate the reaction? Spectator ions are omitted. c) H b) Fe3+ d) Mn2+ a) MnO4 What is the mass percent of iron in the unknown?...
Spring 2019 CSUSM CHEM 175 8. Which statements are true? Select ALL. that apply. a) Dissolution of ammonium nitrate is an endothermic reactio b) Hydrogen gas evolves when calcium carbonate reacts...
Spring 2019 CSUSM CHEM 175 8. Which statements are true? Select ALL. that apply. a) Dissolution of ammonium nitrate is an endothermic reactio b) Hydrogen gas evolves when calcium carbonate reacts with hydrochloric acid. c) The acid-base neutralization reaction is exothermic. ) The value of enthalpy change, AH, of calcium chloride dissolution is positive. sample contains an unknown amount of Fe?'which is titrated with a KMnO, solution in acidie tions to determine the iron composition by mass. A standardized KMnOs...
The Fe2+ (55.845 g/mol) content of a 2.370 g steel sample dissolved in 50.00 mL was...
The Fe2+ (55.845 g/mol) content of a 2.370 g steel sample dissolved in 50.00 mL was determined by tiration with a standardized 0.120 M potassium permanganate (KMnO4, 158.034 g/mol) solution. The titration required 39.51 mL to reach the end point. What is the concentration of iron in the steel sample? Express your answer as grams of Fe per grams of steel (g Fe2+1 g steel). Mno, +8H+ + 5Fe2+ = Mn2+ + 5Fe'+ + 4H,0 Number g Fe2+1 g steel
The Fe2+ (55.84555.845 g/mol) content of a 2.028g steel sample dissolved in 50.00mL of an acidic solution was determined...
The Fe2+ (55.84555.845 g/mol) content of a 2.028g steel sample dissolved in 50.00mL of an acidic solution was determined by tiration with a standardized 0.130 M potassium permanganate (KMnO4KMnO4, 158.034 g/mol) solution. The titration required 36.61 mL to reach the end point. What is the concentration of iron in the steel sample? Express your answer as grams of Fe per gram of steel. MnO−4+8H++5Fe2+↽−−⇀Mn2++5Fe3++ concentration: ______________ g Fe/g steel
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5...
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5Fe3+ (aq) + Mn2(aq) + 4H2O(1) In part A of the experiment, suppose that 1.067 g of Fe(NH4)2(SO4)2.6H2O(s) are placed in a 250 ml Erlenmeyer flask to which 20 mL of water and 8 mL of 3 M H2SO4(aq) are added. The solution was titrated to the end point by adding 26.89 mL of KMnO4(aq) from the...
• CIU TEXAS INSTRUM 2. A 50.00 ml sample of solution containing Fe?ions is titrated with a 0.0216 M KMnO4 solution....
• CIU TEXAS INSTRUM 2. A 50.00 ml sample of solution containing Fe?ions is titrated with a 0.0216 M KMnO4 solution. It required 20.62 ml of the KMnO4 solution to oxidize all the Fe? ions to Fe ions by the reaction: MnO4 (aq) + Fe? ) -------> Mn(ed) Felco (unbalanced) a) What was the concentration of Fel.ions in the sample solution? b) What volume of 0.0150 M K2Cr2O7 solution would it take to do the same titration? The reaction is:...
A sample of an unknown containing Fe2+ in the dissolved sample requires 23.15 mL of a...
A sample of an unknown containing Fe2+ in the dissolved sample requires 23.15 mL of a 0.0020 M KMnO4 solution to reach the end point of the titration. 1)Calculate the moles of KMnO4 reacted. 2) Based on the moles you calculated , calculate how many grams of Fe2+ are in the unknown solution.
? Fe (ag) reacts with MnO Caq) ion in acidic solution to yield Fe (ag) ions...
? Fe (ag) reacts with MnO Caq) ion in acidic solution to yield Fe (ag) ions and Mn'(a) ions. 5 Fe"(aq) + Mno.(aq) + 8H' ? 5 Fe"(aq) + Mn"(aq) + 4H20 A sample of melanterite, FeSO, 7H,O, was analyzed for purity using this reaction by titration of an aqueous solution of the sample. One such sample required 56.15 mL of 0.01301 M permanganate solution to completely titrate all the iron in the sample by the reaction shown above. How...
You have standardized your KMnO4- solution and the molarity is 0.03251M. You used 17.98ml to reach...
You
have standardized your KMnO4- solution and the molarity is
0.03251M. You used 17.98ml to reach equivalence point with your
iron unknown. You started with 1.112g of unknown. What is the %Fe2+
in your unknown? (Fe2+ atomic weight=55.847 g/mol, KMnO4- formula
weight= 158.03g/mol)
You have standardized your KMnO4-solution and the molarity is 0.03251M. You used 17.98ml to reach equivalence point with your iron unknown. You started with 1.112 g of unknown. What is the %Fe?+ in your unknown? (Fe2+ atomic...
An unknown Fe(II) sample is added to 2.50 mL of a 0.0300 M potassium dichromate solution...
An unknown Fe(II) sample is added to 2.50 mL of a 0.0300 M
potassium dichromate solution (in acidic medium) in a 25 mL
volumetric flask. 2 M H2SO4 is added to fill the flask to the
calibration mark. After the reaction proceeds to completion, the
absorbance of the solution at 447 nm is measured to be 0.550 using
a 1.00 cm path length. Calculate the following and enter your
answers with correct significant figures.
A) Molarity of Cr2O7 in the...
A 1.026 g sample of an iron unknown requires 24.35 mL of 0.0195 M MOA solution to reach the end point. The atomic mass of Fe is 55.85 g/mol. Balanced equation: 5Fe2+ (aq) + MnO4 (aq) + 8H(aq) 5Fe(aq) + Mn(aq) + 4H2O) Which species aids in the dissolution of the compounds and helps to facilitate the reaction? Spectator ions are omitted. c) H b) Fe3+ d) Mn2+ a) MnO4 What is the mass percent of iron in the unknown?...
Spring 2019 CSUSM CHEM 175 8. Which statements are true? Select ALL. that apply. a) Dissolution of ammonium nitrate is an endothermic reactio b) Hydrogen gas evolves when calcium carbonate reacts with hydrochloric acid. c) The acid-base neutralization reaction is exothermic. ) The value of enthalpy change, AH, of calcium chloride dissolution is positive. sample contains an unknown amount of Fe?'which is titrated with a KMnO, solution in acidie tions to determine the iron composition by mass. A standardized KMnOs...
The Fe2+ (55.845 g/mol) content of a 2.370 g steel sample dissolved in 50.00 mL was determined by tiration with a standardized 0.120 M potassium permanganate (KMnO4, 158.034 g/mol) solution. The titration required 39.51 mL to reach the end point. What is the concentration of iron in the steel sample? Express your answer as grams of Fe per grams of steel (g Fe2+1 g steel). Mno, +8H+ + 5Fe2+ = Mn2+ + 5Fe'+ + 4H,0 Number g Fe2+1 g steel
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5Fe3+ (aq) + Mn2(aq) + 4H2O(1) In part A of the experiment, suppose that 1.067 g of Fe(NH4)2(SO4)2.6H2O(s) are placed in a 250 ml Erlenmeyer flask to which 20 mL of water and 8 mL of 3 M H2SO4(aq) are added. The solution was titrated to the end point by adding 26.89 mL of KMnO4(aq) from the...
• CIU TEXAS INSTRUM 2. A 50.00 ml sample of solution containing Fe?ions is titrated with a 0.0216 M KMnO4 solution. It required 20.62 ml of the KMnO4 solution to oxidize all the Fe? ions to Fe ions by the reaction: MnO4 (aq) + Fe? ) -------> Mn(ed) Felco (unbalanced) a) What was the concentration of Fel.ions in the sample solution? b) What volume of 0.0150 M K2Cr2O7 solution would it take to do the same titration? The reaction is:...
? Fe (ag) reacts with MnO Caq) ion in acidic solution to yield Fe (ag) ions and Mn'(a) ions. 5 Fe"(aq) + Mno.(aq) + 8H' ? 5 Fe"(aq) + Mn"(aq) + 4H20 A sample of melanterite, FeSO, 7H,O, was analyzed for purity using this reaction by titration of an aqueous solution of the sample. One such sample required 56.15 mL of 0.01301 M permanganate solution to completely titrate all the iron in the sample by the reaction shown above. How...
You
have standardized your KMnO4- solution and the molarity is
0.03251M. You used 17.98ml to reach equivalence point with your
iron unknown. You started with 1.112g of unknown. What is the %Fe2+
in your unknown? (Fe2+ atomic weight=55.847 g/mol, KMnO4- formula
weight= 158.03g/mol)
You have standardized your KMnO4-solution and the molarity is 0.03251M. You used 17.98ml to reach equivalence point with your iron unknown. You started with 1.112 g of unknown. What is the %Fe?+ in your unknown? (Fe2+ atomic...
An unknown Fe(II) sample is added to 2.50 mL of a 0.0300 M
potassium dichromate solution (in acidic medium) in a 25 mL
volumetric flask. 2 M H2SO4 is added to fill the flask to the
calibration mark. After the reaction proceeds to completion, the
absorbance of the solution at 447 nm is measured to be 0.550 using
a 1.00 cm path length. Calculate the following and enter your
answers with correct significant figures.
A) Molarity of Cr2O7 in the...
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