Question

In: Chemistry

What is the cell potential of the following cell at 25 oC? Standard Reduction table Cr...

What is the cell potential of the following cell at 25 ^oC?

Standard Reduction table

Cr / Cr³⁺ (0.053 M) // Ag¹⁺ (0.52 M) / Ag

E=____________ V

Expert Solution

Cr(s) -------------------------> Cr^3+ (aq) + 3e^- E0 = 0.74v

3Ag^+ (aq) + 3e^- ---------------> 3Ag(s) E0 = 0.80v

---------------------------------------------------------------------------------------------

Cr(s) + 3Ag^+ (aq) ------------------> Cr^3+ (aq) + 3Ag(s) E0 cell = 1.54v

n = 3

[Cr^3+] = 0.053M

[Ag^+] = 0.52M

Ecell = E0cell - 0.0592/n logQ

= 1.54- 0.0592/3 log[Cr^3+]/[Ag^+]^3

= 1.54 -0.0197log0.053/(0.52)^3

= 1.54 - 0.0197log0.376

= 1.54-0.0197*-0.4248

= 1.548v >>>>>answer

queen_honey_blossom answered 2 years ago

From the standard reduction potentials in Table 11.1 in the Appendix, calculate the standard cell potential...

From the standard reduction potentials in Table 11.1 in the Appendix, calculate the standard cell potential and the equilibrium constant at 298.15 K for the following reactions: (a) 4 NiOOH(s) + 2 H2O(l) ↔ 4 Ni(OH)2(s) + O2(g) (b) 4 NO3 - (aq) + 4 H+ (aq) ↔ 4 NO(g) + 2 H2O (l) + 3 O2(g)

What is the standard reduction potential of the Y3+/Y redox couple if the cell potential of...

What is the standard reduction potential of the Y3+/Y redox couple if the cell potential of the following cell at 25 oC is 1.22 V? Zn / Zn2+ (0.72 M) // Y3+ (1.2 M) / Y Eo =

What is the standard reduction potential of the Y1+/Y redox couple if the cell potential of...

What is the standard reduction potential of the Y1+/Y redox couple if the cell potential of the following cell at 25 oC is 0.98 V? Zn / Zn2+ (0.34 M) // Y1+ (1.1 M) / Y Eo = What is the cathode pH in Co/Co2+(1.00 M)//H1+(x M), H2(1.0 atm)/Pt if E = 0.06 V? Give the pH to 0.01. pH=

What is the standard voltage or cell potential of a Cr-Hg cell? (Remember to switch one-half...

What is the standard voltage or cell potential of a Cr-Hg cell? (Remember to switch one-half reaction to oxidation and to balance the number of electrons--use paper.) Cr3+(aq)+ 3e- → Cr(s) Eo = -0.74 V Hg2+(aq)+ 2e- → Hg(l) Eo = +0.789 V

7. Given the standard reduction potential for the following two half-cell reactions (in the presence of...

7. Given the standard reduction potential for the following two half-cell reactions (in the presence of 1.00 M HCl): Fe3+ + e <==> Fe2+, E0 = + 0.68 V AsO4 - + 2H+ + 2e <==> AsO3 - + H2O, Eo = +0.559 V. Please calculate the system potential at the equivalence point when Fe3+ was used to titrate AsO3 - in the presence of 1.00 M HCl. Answer: 0.60 V

If the cell potential for a voltaic cell is 0.250 V, and the reduction potential for...

If the cell potential for a voltaic cell is 0.250 V, and the reduction potential for the oxidation reaction is ⎯0.150 V, what is the reduction potential for the reaction occurring at the cathode?

What is the reduction potential at 25∘C for the hydrogen electrode in each of the following...

What is the reduction potential at 25∘C for the hydrogen electrode in each of the following solutions? The half-reaction is as follows: 2H+(aq)+2e−→H2(g,1atm) Part A 1.0 M HCl. Part B A solution having pH = 4.16. Part C Pure water. Part D 1.1 M NaOH.

Use the table of standard reduction potentials given above to calculate the equilibrium constant at standard temperature (25 ∘C) for the following reaction:

Standard reduction potentials Reduction half-reaction E∘ (V) Ag+(aq)+e−→Ag(s) 0.80 Cu2+(aq)+2e−→Cu(s) 0.34 Sn4+(aq)+4e−→Sn(s) 0.15 2H+(aq)+2e−→H2(g) 0 Ni2+(aq)+2e−→Ni(s) −0.26 Fe2+(aq)+2e−→Fe(s) −0.45 Zn2+(aq)+2e−→Zn(s) −0.76 Al3+(aq)+3e−→Al(s) −1.66 Mg2+(aq)+2e−→Mg(s) −2.37 Part A Use the table of standard reduction potentials given above to calculate the equilibrium constant at standard temperature (25 ∘C) for the following reaction: Fe(s)+Ni2+(aq)→Fe2+(aq)+Ni(s) Express your answer numerically. Part B Calculate the standard cell potential (E∘) for the reaction X(s)+Y+(aq)→X+(aq)+Y(s) if K = 3.04×10−3. Express your answer to three significant figures and include the appropriate...

Calculate the Standard Reduction potential of Substance B when e = -0.62 V at 25 °C;...

Calculate the Standard Reduction potential of Substance B when e = -0.62 V at 25 °C; [Breduced] = 50 µM, and [Boxidized] = 2 µM. Assume that n = 2.

Calculate the cell potential for the galvanic cell in which the following reaction occurs at 25...

Calculate the cell potential for the galvanic cell in which the following reaction occurs at 25 °C, given that [Al3 ] = 0.00120 M and [Au3 ] = 0.787 M. Al (s) + Au^3+ (aq) <===> Al^3+ (aq) + Au (s)