Analysis of a Transition Metal Oxalate Complex Salt Hydrate The composition of a hydrated potassium-salt of...
Analysis of a Transition Metal Oxalate Complex Salt Hydrate
The composition of a hydrated potassium-salt of a chromium(III)-oxalate complex ion conforms to the general formula:
| KxCr(C2O4)2·wH2O |
A 0.2203-g sample of this compound required 19.84 mL of 0.02765 M KMnO4 solution for the titration of all of the oxalate.
Calculate the number of moles (mol) of oxalate in this sample.
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Calculate the number of moles of oxalate per gram (mol/g) of the compound.
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Calculate the molar mass of the compound.
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What is the value of x?
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What is the value of w?
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Analysis of a Transition Metal Oxalate Complex Salt Hydrate
The composition of a hydrated potassium-salt of...
The composition of a hydrated tetramethylammonium-salt of a chromium(III)-oxalate complex ion conforms to the general formula:...
The composition of a hydrated tetramethylammonium-salt of a chromium(III)-oxalate complex ion conforms to the general formula: (N(CH3)4)xCr(C2O4)3·wH2O A 0.4986-g sample of this compound required 36.96 mL of 0.02909 M KMnO4 solution for the titration of all of the oxalate. Molar mass = 5.565×102 g/mol X = 3 What is w?
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...
With the completion of the determinations of % potassium, % iron, and % oxalate in the...
With the completion of the determinations of % potassium, % iron, and % oxalate in the crystals, you may calculate the % water. The percentage compositionof the crystals, KxFe(C2O4)y · zH2O, has then been completely determined experimentally. The simplest formula (x,y,z) can now be calculated from the the percentage composition. Once the formula is know it is then possible to calculate the percent yield of product that was obtained in the preparation and purification of the crystals. From Part A:...
With the completion of the determinations of % potassium, % iron, and % oxalate in the...
With the completion of the determinations of % potassium, %
iron, and % oxalate in the crystals, you may calculate the % water.
The percentage compositionof the crystals,
KxFe(C2O4)y ·
zH2O, has then been completely determined
experimentally. The simplest formula (x,y,z) can now be calculated
from the the percentage composition. Once the formula is know it is
then possible to calculate the percent yield of product that was
obtained in the preparation and purification of the crystals.
From Part 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....
Given the following data, determine the % by mass of oxalate (C2O42-) in a sample of...
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 = 11.91 mL Enter your answer to 3 significant figures. Do not...
From Part A: Mass of KxFe(C2O4)y · zH2O prepared : 4.359 g Mass of FeCl3 : 1.60 g From Part B: % ...
From Part A: Mass of KxFe(C2O4)y · zH2O prepared : 4.359 g Mass of FeCl3 : 1.60 g From Part B: % Potassium in compound : 22.70 % % Iron (from ion exchange & titration vs. NaOH) : 10.60 % From Part C: % Oxlate : 55.69 % Now, let's finish the calculation and the determination of the formula of the iron compound: Calculate the % water of hydration : Tries 0/3 Calculate the following for Fe3+: g in 100...
A sample of an Iron Oxalato complex salt weighting 0.13 grams requires 31.27 mL of 0.013...
A sample of an Iron Oxalato complex salt weighting 0.13 grams requires 31.27 mL of 0.013 M KMnO4 to turn the solution a very light pink color at the quivalence point. 1.Calculate the number of moles of KMnO4 added. 2. Calculate the number of moles of C2O42− in the sample of the oxalate salt. 3.Calculate the number of grams of C2O42− in the sample. 4. Calculate the percent weight of C2O42− in the original Iron Oxalato Complex salt sample.
From Part A: Mass of KxFe(C2O4)y · zH2O prepared : 4.200 g Mass of FeCl3 :...
From Part A: Mass of KxFe(C2O4)y · zH2O prepared : 4.200 g Mass of FeCl3 : 1.60 g From Part B: % Potassium in compound : 22.00 % % Iron (from ion exchange & titration vs. NaOH) : 9.10 % From Part C: % Oxlate : 36.96 % - Calculate the % water of hydration : Calculate the following for Fe3+: g in 100 g sample mol in 100 g sample mol/mol Fe (3 sig figs) mol/mol Fe (whole number)...
A solid sample of a complex salt, with ideal composition Ni(NH3)6(NO3)2, was analyzed for nickel by...
A solid sample of a complex salt, with ideal composition
Ni(NH3)6(NO3)2, was
analyzed for nickel by dissolution in slightly acidic solution and
precipitation as the dimethylglyoximate, Ni(DMG)2.
A sintered glass crucible of mass 13.2379 g was used to filter
off the precipitate. The dried crucible and precipitate had a
combined mass of 13.3319 g.
Calculate the theoretical mass of the original
Ni(NH3)6(NO3)2
sample.
0.0927 g
You are correct.
Your receipt no. is 152-9832
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Calculate the mass of nickel...
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...
With the completion of the determinations of % potassium, %
iron, and % oxalate in the crystals, you may calculate the % water.
The percentage compositionof the crystals,
KxFe(C2O4)y ·
zH2O, has then been completely determined
experimentally. The simplest formula (x,y,z) can now be calculated
from the the percentage composition. Once the formula is know it is
then possible to calculate the percent yield of product that was
obtained in the preparation and purification of the crystals.
From Part A:...
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