Standard Reduction Potential Half-Reaction Ca2 ag)2e Mn2)2eMn (s) AG Aff Eo, Vol

Question

Standard Reduction Potential Half-Reaction Ca2 ag)2e Mn2)2eMn (s) AG Aff Eo, Volts Ca (s) - 2.87 Se+) -0.28 0.00 0.80 1.36 2 H ) 2e Ag (ag)+ e ? H2 (g) Ag (s) ? 2Cl (aq) Given the partial list of standard reduction potentials above, answer Questions 1-5 I. Will calcium (Ca) spontancously reduce silver ion (Ag') to silver (Ag)? Briefly explain your answer. If yes, what is E°? The resucton Potential Catt rs nesethe Shou ny 3o 2.3.61 2. Will silver metal react spontaneously with HCI (a) to produce H2 e? Briefly explain. 3. What is the cell potential for the Mn/Mn Co Co cell, based on the standard potentials given above? 4. Will the reaction between Ca2 and Cl ions to form Ca metal and Cl2 () be spontaneous? Briefly explain. 5. A student constructed a Mg/Mg2||Ag'/Ag cell and measured a cell potential of 3.17 volts. Calculate the reduction potential of the Mg/Mg half-reaction.

Explanation / Answer

(4) To form Ca metal from Ca2+ ions, Ca2+ ions must be recuced and to form Cl2(g) from Cl- ions, Cl- ions have to be oxidised.

Cl-(aq)---------> Cl2(g) + 2e- => anode

Ca2+(aq) + 2e- -----------> Ca(s) => Cathode

Eocell = Eocathode - Eoanode

Eocell = -2.87 - 1.36

Eocell = -4.23 V

As Eocell is negative, the reaction is not spontaneous.

(5)

Anode : Mg(s) -----------> Mg2+(aq) + 2e-

Cathode : Ag+(aq) + e- -------------> Ag(s)

Eocell = Eocathode - Eoanode

3.17= 0.80 - Eoanode

Eoanode = -2.37 V

reduction potential of Mg/Mg2+ half reaction is -2.37 V

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.