Homework Answers
Frost diagrams are plots of z × E° vs. O.N. for reactions {O.N. = n} → {O.N. = 0}, where z = |n|.
on Y axis we plot z*E0 and on X-axis we plot oxidation number
Ions – have only f valence e-
Ce = [Xe]4f2 6s2
Ce3+ = [Xe]4f1 Ce4+ = [Xe]
Ce+4 is most stable as it has electronic configuration of a noble gas
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Construct a Frost diagram for the cerium from given following information, and discuss the relative stability...
Construct a frost diagram for the species in the Latimer diagram in problem 2. Here is...
Construct a frost diagram for the species in the Latimer diagram in problem 2. Here is problem 2 but I do not need you to do problem 2 I need help with the diagram. Problem 2: Identify the changes in oxidation states in the following equations: Mg (s) + FeSO4 (aq) -> Fe (s) + MgSO4 (aq) 2 HNO3 (aq) + 3 H2S (aq) -> 2 NO (g) + 3 S (s) + 4 H2O (l)
(b) Oxalate (C2042) binds strongly to many transition metals, including iron, in lower oxidation states but...
(b) Oxalate (C2042) binds strongly to many transition metals, including iron, in lower oxidation states but not at all to their anionic oxoanions (e.g. [FeO4]2). The Frost diagram for Fe is given below (note that the numbers in parentheses corresponds to the vE values for the different species). The overall equilibrium (stability) constant for formation of [Fe(C204)j* is ß3 = 10193. 6 FeOj (5.89) 4 2 Fe (0) Fe (-0.11) Fe (-0.88) 2 6 Oxidation number Use the information above...
4. Write a balanced equation from each cell notation, then calculate thee of the cell, is...
4. Write a balanced equation from each cell notation, then calculate thee of the cell, is it spontaneous or nonspontaneous? A. Cr(s) Crot || Cui Cu(s) B. Al(s) Al* | Ce Ce Pt C. Cu (s) Cu? || Al Al (s) Useful information: F= 96485 J/V mol electrons, AG ----F-Ecell AG --RTINK: Ece 0.0592/n*logK; EcellEcett -0.0592/n*logQ Ce (aq) + Ag+ (aq) + e Fet (aq) + Cu" (aq) + Cu (aq) + 2e 2H(aq) + 2 Pb (aq) + 2e...
Parts a-j of this question refer to the following cell at 298 K. Complete the diagram...
Parts a-j of this question refer to the following cell at 298 K. Complete the diagram of the following voltaic cell: Zinc and iron electrodes, aqueous zinc nitrate, aqueous iron (III) nitrate, potassium nitrate salt bridge. Fe3+ (aq) + 3e- → Fe (s) E°= -0.040 V Ag+(aq) + e- → Ag(s) E°= 0.795 V a. Identify the electrodes as Anode or Cathode. Write the correct metal for each assuming the reactions are spontaneous b. Show the direction of the electron...
Calculate the value of K given the following information anodel:(oxidation) Fe(s) Fe2+ (aq) + 2e E...
Calculate the value of K given the following information anodel:(oxidation) Fe(s) Fe2+ (aq) + 2e E ? Fe = -0.447 V cathodel:(reduction): 2 x (Ag+ (aq) + e- Ag(s) Eig'lag = 0.7996; V 0.0592 Hint: Use E cell logk Calculate E Cell first. n 2.6 O 1.247 O 1.3X1042 none of the above
Given the following answer the questions below: a) the metal that is the cathode is ________...
Given the following answer the questions below: a) the metal that is the cathode is ________ and the metal that is the anodes _______ b) reduction takes place at the Ag or Cu electrode (circle one) c) Oxidation takes place at the Ag or Cu electrode (circle one) d) Identify the salt bridge on the cell diagram. e) Calculate Ecell: Cu2+ (aq) + 2e- --> Cu(s) E= +0.34 V Ag+(aq) + e- --> Ag(s) E= +0.80 V
If the value of E_cell^0 is 2.10 V for the reaction F_2 (g) + 2Fe^2+ (aq)...
If the value of E_cell^0 is 2.10 V for the reaction F_2 (g) + 2Fe^2+ (aq) rightarrow 2Fe^3+ (aq) + 2F^- (aq), what is the value of E_cell^0 for F^+ (aq) + Fe^3+ (aq) rightarrow Fe^2+ (aq) + 1/2 F_2 (g)? a. -4.20 V b -1.05 V c. 2.10V d. 1.05 V e. -2.10 V Given. Al^3+ (aq) + 3e^- Al(s); E^0 = -1.66 V Cl_2 (g) + 2e 2Cl^- (aq); E^0 = 1.36 V What is Delta G degree...
Fill in the Blanks Ered (V) 0.68 0.52 0.40 0.34 0.16 0 Half Reaction Ered (V)...
Fill in the Blanks Ered (V) 0.68 0.52 0.40 0.34 0.16 0 Half Reaction Ered (V) Half Reaction F2+2e →2F 2.87 02 + 2H+ 2e →H,O, Ag?+ e → Ag 1.99 Cute → Cu Code → CO2 1.82 O2 + 2H,0 + 4e → 40H H,02 + 2H+ + 2e → 2H,0 1.78 Cu2+ + 2e → Cu Ce+ + → Ce+ 1.70 Cu2+ e → Cu PbO, + 4H* +502 +2e → PbSO4 + 2H,0 1.69 2H*+2e → H2...
Page 3 An electrochemical is prepared from a chromium metal electrode in contact solution of 0.500 M chromium (III)...
Page 3 An electrochemical is prepared from a chromium metal electrode in contact solution of 0.500 M chromium (III) nitrate and a standard hydrogen half-cell elect The two half cells are connected by a porous disk or a KCl salt bridge. Standard Reduction Potentials at 298 K Cr+ (aq) + 3e ----> Cr(s) Cr+ (aq) + e ----> Cr2+ (aq) E° = -0.740 V E° = -0.440 V a) Write the reaction for the cell and calculate the standard free...
9. In Part 2 of this experiment, you will observe the reaction of aluminum in an...
9. In Part 2 of this experiment, you will observe the reaction of aluminum in an aqueous CuCl, solution. a) Given the following half-reactions, predict if aluminum will dissolve in a CuCl, solution. A13+ (aq) + 3e + Al(s) E = - 1.70 V Cu2+ (aq) + 2e - → Cu (s) E = 0.34 V b) The more positive the cell potential the more spontaneous the reaction will be. What precautions should you take in performing this experiment if...
(b) Oxalate (C2042) binds strongly to many transition metals, including iron, in lower oxidation states but not at all to their anionic oxoanions (e.g. [FeO4]2). The Frost diagram for Fe is given below (note that the numbers in parentheses corresponds to the vE values for the different species). The overall equilibrium (stability) constant for formation of [Fe(C204)j* is ß3 = 10193. 6 FeOj (5.89) 4 2 Fe (0) Fe (-0.11) Fe (-0.88) 2 6 Oxidation number Use the information above...
4. Write a balanced equation from each cell notation, then calculate thee of the cell, is it spontaneous or nonspontaneous? A. Cr(s) Crot || Cui Cu(s) B. Al(s) Al* | Ce Ce Pt C. Cu (s) Cu? || Al Al (s) Useful information: F= 96485 J/V mol electrons, AG ----F-Ecell AG --RTINK: Ece 0.0592/n*logK; EcellEcett -0.0592/n*logQ Ce (aq) + Ag+ (aq) + e Fet (aq) + Cu" (aq) + Cu (aq) + 2e 2H(aq) + 2 Pb (aq) + 2e...
Calculate the value of K given the following information anodel:(oxidation) Fe(s) Fe2+ (aq) + 2e E ? Fe = -0.447 V cathodel:(reduction): 2 x (Ag+ (aq) + e- Ag(s) Eig'lag = 0.7996; V 0.0592 Hint: Use E cell logk Calculate E Cell first. n 2.6 O 1.247 O 1.3X1042 none of the above
If the value of E_cell^0 is 2.10 V for the reaction F_2 (g) + 2Fe^2+ (aq) rightarrow 2Fe^3+ (aq) + 2F^- (aq), what is the value of E_cell^0 for F^+ (aq) + Fe^3+ (aq) rightarrow Fe^2+ (aq) + 1/2 F_2 (g)? a. -4.20 V b -1.05 V c. 2.10V d. 1.05 V e. -2.10 V Given. Al^3+ (aq) + 3e^- Al(s); E^0 = -1.66 V Cl_2 (g) + 2e 2Cl^- (aq); E^0 = 1.36 V What is Delta G degree...
Fill in the Blanks Ered (V) 0.68 0.52 0.40 0.34 0.16 0 Half Reaction Ered (V) Half Reaction F2+2e →2F 2.87 02 + 2H+ 2e →H,O, Ag?+ e → Ag 1.99 Cute → Cu Code → CO2 1.82 O2 + 2H,0 + 4e → 40H H,02 + 2H+ + 2e → 2H,0 1.78 Cu2+ + 2e → Cu Ce+ + → Ce+ 1.70 Cu2+ e → Cu PbO, + 4H* +502 +2e → PbSO4 + 2H,0 1.69 2H*+2e → H2...
Page 3 An electrochemical is prepared from a chromium metal electrode in contact solution of 0.500 M chromium (III) nitrate and a standard hydrogen half-cell elect The two half cells are connected by a porous disk or a KCl salt bridge. Standard Reduction Potentials at 298 K Cr+ (aq) + 3e ----> Cr(s) Cr+ (aq) + e ----> Cr2+ (aq) E° = -0.740 V E° = -0.440 V a) Write the reaction for the cell and calculate the standard free...
9. In Part 2 of this experiment, you will observe the reaction of aluminum in an aqueous CuCl, solution. a) Given the following half-reactions, predict if aluminum will dissolve in a CuCl, solution. A13+ (aq) + 3e + Al(s) E = - 1.70 V Cu2+ (aq) + 2e - → Cu (s) E = 0.34 V b) The more positive the cell potential the more spontaneous the reaction will be. What precautions should you take in performing this experiment if...
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