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For the following reaction between Mohr's salt (iron as FeSO4(NH4)2S04 6H2O) and potassium dichromate (dichromate as...
The reaction between iron(II) ( Fe2+ ) and dichromate ( Cr2O2−7 ) in the presence of...
The reaction between iron(II) ( Fe2+ ) and dichromate ( Cr2O2−7 ) in the presence of a strong acid ( H+ ) is shown. Cr2O2−7+6Fe2++14H+⟶2Cr3++6Fe3++7H2O Determine the volume, in milliliters, of a 0.180 M solution of Mohr's salt ( (NH4)2Fe(SO4)2⋅6H2O ) needed to completely react with 0.0500 L of 0.180 M potassium dichromate ( K2Cr2O7 ). volume? ... mL What volume, in milliliters, of 0.180 M K2Cr2O7 is required to completely react with 0.0500 L of a 0.180 M solution...
The amount of iron in steel can be determined by titration with dichromate. First, the steel...
The amount of iron in steel can be determined by titration with dichromate. First, the steel is dissolved in hydrochloric acid to oxidize all the iron to Feat. An indicator is added that will react with excess dichromate. Then, potassium dichromate is added to the solution until the end point is reached. Cr, 02- +6Fe2+ + 14H+ > 2Cr3+ +6Fe3+ + 74,0 For the analysis of 2.00 g of steel, the titration required 22.70 mL of 0.1800 M K2Cr207. What...
The reaction between iron(II) (Fe2+) and dichromate (Cr, O) in the presence of a strong acid...
The reaction between iron(II) (Fe2+) and dichromate (Cr, O) in the presence of a strong acid (Ht) is shown. Cr,O +6 Fe2+ + 14H 2 Cr +6 Fe +7 H,O Determine the volume, in milliliters, of a 0.250 M solution of Mohr's salt ((NH,), Fe(So react with 0.0500 L of 0.250 M potassium dichromate (K,Cr,O,) 6H,O) needed to completely volume: mL What volume, in milliliters, of 0.250 M K,Cr, O, is required to completely react with 0.0500 L of a...
Using the molar ratio of the redox reaction between chromium as potassium dichromate and Fe2+ as...
Using the molar ratio of the redox reaction between chromium as potassium dichromate and Fe2+ as ferrous ammonium sulfate, how can we determine how much of the ferrous ammonium sulfate (solid) should be added to a 20mL sample of wastewater containing 600mg/L of chromium (from potassium dichromate) in order to reduce the hexavalent chromium to trivalent chromium? Based on 6Fe2 + Cr2O7 2- + 14H+ - - > 2Cr 3+ + 7H2O + 6Fe 3+
(K,Cr,0.) Be sure your Calculate the volume in milliliters of a 0.128 mol/L potassium dichromate solution...
(K,Cr,0.) Be sure your Calculate the volume in milliliters of a 0.128 mol/L potassium dichromate solution that contains 100. mmol of potassium dichromate answer has the correct number of significant digits. 10 ml ?
The reaction between potassium dichromate and concentrated hydrochloric acid, produces a mixed aqueous solution of chro...
The reaction between potassium dichromate and concentrated hydrochloric acid, produces a mixed aqueous solution of chromium(III) chloride and potassium chloride, and evolving gaseous chlorine. K2Cr2O7(s) + 14 HCl(aq) ⟶ 2 K+(aq) + 2 Cr3+(aq) + 8 Cl- (aq) + 7 H2O(l) + 3 Cl2(g) Suppose that 9.73 g of K2Cr2O7(s) react with concentrated HCl, and that the final volume of the solution is 124.3 mL. Calculate the final concentration of Cr3+(aq) produced: (Aside: also, think about and the number of...
The reaction between potassium dichromate and concentrated hydrochloric acid, produces a mixed aqueous solution of chromium(III)...
The reaction between potassium dichromate and concentrated hydrochloric acid, produces a mixed aqueous solution of chromium(III) chloride and potassium chloride, and evolving gaseous chlorine. K2Cr2O7(s) + 14 HCl(aq) ⟶ 2 K+(aq) + 2 Cr3+(aq) + 8 Cl- (aq) + 7 H2O(l) + 3 Cl2(g) Suppose that 9.73 g of K2Cr2O7(s) react with concentrated HCl, and that the final volume of the solution is 124.3 mL. Calculate the final concentration of Cr3+(aq) produced: (Aside: also, think about and the number of...
2) ( ) An acidic potassium dichromate can be used to titrate a solution of iron(II)...
2) ( ) An acidic potassium dichromate can be used to titrate a solution of iron(II) ions since it reacts according to the following equation: Cr2O72 (aq) +6 Fe* (aq) +14 H30' (aq) - 2 Cr* (aq) + 6 Fe" (aq) + 21 H20 (1) a. What is the oxidizing agent in the above reaction? b. A dichromate stock solution is made by dissolving 2.567 g of K Cr2O, (294.2 g/mol) in a total of 50.0 ml. What is the...
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...
21. Consider the following balanced redox reaction: 2Cr3+ (aq) + 7H2O(l) + 6Fe3+ (aq) + Cr20,2-(aq)...
21. Consider the following balanced redox reaction: 2Cr3+ (aq) + 7H2O(l) + 6Fe3+ (aq) + Cr20,2-(aq) + 14H+ (aq) + 6Fe2+ (aq) (a) (0.5 mark) What is the oxidation number of Cr in Cr20-2-? INSTRUCTIONS: Give your answer as a WHOLE NUMBER (i.e. 1, if positive or -1, if negative). * Tries 0/2 (b) (0.5 mark) What is the oxidizing agent in this reaction? Fe3+ Fe2+ H+ • Cr2O2- H2O O Cr3+ 13. (1 mark) Which statement is TRUE about...
The amount of iron in steel can be determined by titration with dichromate. First, the steel is dissolved in hydrochloric acid to oxidize all the iron to Feat. An indicator is added that will react with excess dichromate. Then, potassium dichromate is added to the solution until the end point is reached. Cr, 02- +6Fe2+ + 14H+ > 2Cr3+ +6Fe3+ + 74,0 For the analysis of 2.00 g of steel, the titration required 22.70 mL of 0.1800 M K2Cr207. What...
The reaction between iron(II) (Fe2+) and dichromate (Cr, O) in the presence of a strong acid (Ht) is shown. Cr,O +6 Fe2+ + 14H 2 Cr +6 Fe +7 H,O Determine the volume, in milliliters, of a 0.250 M solution of Mohr's salt ((NH,), Fe(So react with 0.0500 L of 0.250 M potassium dichromate (K,Cr,O,) 6H,O) needed to completely volume: mL What volume, in milliliters, of 0.250 M K,Cr, O, is required to completely react with 0.0500 L of a...
(K,Cr,0.) Be sure your Calculate the volume in milliliters of a 0.128 mol/L potassium dichromate solution that contains 100. mmol of potassium dichromate answer has the correct number of significant digits. 10 ml ?
2) ( ) An acidic potassium dichromate can be used to titrate a solution of iron(II) ions since it reacts according to the following equation: Cr2O72 (aq) +6 Fe* (aq) +14 H30' (aq) - 2 Cr* (aq) + 6 Fe" (aq) + 21 H20 (1) a. What is the oxidizing agent in the above reaction? b. A dichromate stock solution is made by dissolving 2.567 g of K Cr2O, (294.2 g/mol) in a total of 50.0 ml. What is the...
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...
21. Consider the following balanced redox reaction: 2Cr3+ (aq) + 7H2O(l) + 6Fe3+ (aq) + Cr20,2-(aq) + 14H+ (aq) + 6Fe2+ (aq) (a) (0.5 mark) What is the oxidation number of Cr in Cr20-2-? INSTRUCTIONS: Give your answer as a WHOLE NUMBER (i.e. 1, if positive or -1, if negative). * Tries 0/2 (b) (0.5 mark) What is the oxidizing agent in this reaction? Fe3+ Fe2+ H+ • Cr2O2- H2O O Cr3+ 13. (1 mark) Which statement is TRUE about...
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