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QUESTION 5 What is the percent by mass of oxalate ion in a 0.175 g sample...
What is the percent by mass of oxalate ion in a 0.291 g sample of the...
What is the percent by mass of oxalate ion in a 0.291 g sample of the iron salt that took 20.91 mL of 0.02073 M potassium permanganate to titrate to a light pink endpoint?
QUESTION 3 What is the percent by mass of sodium oxalate in a 0.853 g sample...
QUESTION 3 What is the percent by mass of sodium oxalate in a 0.853 g sample that took 17.81 mL of 0.03178 M potassium permanganate to titrate to a light pink endpoint? Answer could be greater than 100%
What is the percent by mass of sodium oxalate in a 0.614 g sample that took 20.96 mL of 0.03513 M potassium permanganate...
What is the percent by mass of sodium oxalate in a 0.614 g sample that took 20.96 mL of 0.03513 M potassium permanganate to titrate to a light pink endpoint?
Mass of KxFe(C2O4)y · zH2O : 4.70 g Mass of sample : 0.175 g Mass of...
Mass of KxFe(C2O4)y · zH2O : 4.70 g Mass of sample : 0.175 g Mass of FeCl3 used in preparation : 1.60 g Molarity of standard NaOH used : 0.100 V1, volume of standard NaOH required for first equivalence point : 7.750 mL V2, volume of standard NaOH required for second equivalence point : 19.70 mL 1. Calculate the mass of potassium in the sample 2. Calculate the percent of potassium in the sample 3. Calculate the volume of standard...
BACKGROUND: Synthesis of Potassium Iron (III) Oxalate Hydrate Salt The iron(II) ions from Fe(NH4)2(SO4)2•6H2O will be precipitated as iron(II) oxalate. Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s) The su...
BACKGROUND: Synthesis of Potassium Iron
(III) Oxalate Hydrate Salt
The iron(II) ions from
Fe(NH4)2(SO4)2•6H2O
will be precipitated as iron(II) oxalate.
Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s)
The supernatant liquid, containing the ammonium and sulfate
ions, as well as excess oxalate ions and oxalic acid will be
decanted and discarded. The solid will then be re-dissolved and the
iron(II) ions will be oxidized to iron(III) ions by reaction with
hydrogen peroxide.
2Fe^2+(aq) + H2O2(aq) --> 2Fe^3+(aq) +2 OH^ - (aq)
The...
The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many...
The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 11.874 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.300 M sodium sulfate is added, a white precipitate forms. The sodium sulfate solution is added until no more precipitate forms, then a few excess milliliters are added. The precipitate is filtered, washed, and dried. It has a...
1. Calculations Given the following data, determine the % by mass of oxalate (C2O42-) in a...
1. Calculations Given the following data, determine the % by mass of oxalate (C2O42-) in a sample of an iron oxalate complex with the general formula Kz[Fex(C2O4)y].wH2O. The reaction between oxalate and permanganate is as follows: 6H+ + 5(COOH)2 + 2MnO4- → 10CO2 + 2Mn2+ + 8H2O m(iron oxalate complex) used for titration = 0.100 g C(KMnO4) standard solution = 0.0200 M M(C2O42-) = 88.02 g mol-1 Titre volume = 10.18 mL Enter your answer to 3 significant figures. 2....
i need help answering the table by tonight for my test!! thank you!! Trial 1 Prelaboratory...
i need help answering the table by tonight for my test!! thank
you!!
Trial 1 Prelaboratory Assignment 1. What is the primary standard used in this experiment? What is the molar mass of the primary standard? 2. Use the chemical formula for the primary standard to write the chemical reaction for the standardization of potassium permanganate. 3. What will indicate the endpoint of the titration? 4. A 0.495 g sample of iron containing salt required 20.22 mL of 0.0194 M...
QUESTION 4 What is the molarity (mol/L) of a potassium permanganate solution if 17.67 mL of...
QUESTION 4 What is the molarity (mol/L) of a potassium permanganate solution if 17.67 mL of it was used to titrate a 12.62 mL sample of a 0.1272 M sodium oxalate standard solution.
Question 5 2/2 points A 3.7602 g sample of an unknown salt containing ferrous ion was...
Question 5 2/2 points A 3.7602 g sample of an unknown salt containing ferrous ion was dissolved and diluted to 250.0 ml. Repeat 25.00 mL samples of the total solution were titrated with 0.01221 M KMNO4 solution, and the mean of three accepted corrected titration volumes was 13.36 mL. Calculate the %w/w of iron in the original sample mass. State your answer to 2 places after the decimal place. Do not enter units.
QUESTION 3 What is the percent by mass of sodium oxalate in a 0.853 g sample that took 17.81 mL of 0.03178 M potassium permanganate to titrate to a light pink endpoint? Answer could be greater than 100%
BACKGROUND: Synthesis of Potassium Iron
(III) Oxalate Hydrate Salt
The iron(II) ions from
Fe(NH4)2(SO4)2•6H2O
will be precipitated as iron(II) oxalate.
Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s)
The supernatant liquid, containing the ammonium and sulfate
ions, as well as excess oxalate ions and oxalic acid will be
decanted and discarded. The solid will then be re-dissolved and the
iron(II) ions will be oxidized to iron(III) ions by reaction with
hydrogen peroxide.
2Fe^2+(aq) + H2O2(aq) --> 2Fe^3+(aq) +2 OH^ - (aq)
The...
i need help answering the table by tonight for my test!! thank
you!!
Trial 1 Prelaboratory Assignment 1. What is the primary standard used in this experiment? What is the molar mass of the primary standard? 2. Use the chemical formula for the primary standard to write the chemical reaction for the standardization of potassium permanganate. 3. What will indicate the endpoint of the titration? 4. A 0.495 g sample of iron containing salt required 20.22 mL of 0.0194 M...
QUESTION 4 What is the molarity (mol/L) of a potassium permanganate solution if 17.67 mL of it was used to titrate a 12.62 mL sample of a 0.1272 M sodium oxalate standard solution.
Question 5 2/2 points A 3.7602 g sample of an unknown salt containing ferrous ion was dissolved and diluted to 250.0 ml. Repeat 25.00 mL samples of the total solution were titrated with 0.01221 M KMNO4 solution, and the mean of three accepted corrected titration volumes was 13.36 mL. Calculate the %w/w of iron in the original sample mass. State your answer to 2 places after the decimal place. Do not enter units.
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