2. [5 pts] Consider the voltaic cell shown below: Agls) Cols) NaNO (s) salt brid

Question

2. [5 pts] Consider the voltaic cell shown below: Agls) Cols) NaNO (s) salt bridge Cochloq) (a) [I pts] Given that cobalt is more reactive than silver which electrode Co or Ag is the anode? Write the half reaction for the reaction that occurs at the anode? [I ps) Which electrode is the cathode? Write the half reacion for the reaction that occurs at the cathode? (o) (c) [I pts] Write the overall redox reaction for the voltaic cell (d) [I pts] Identify the oxidizing and reducing agent in the reaction (e) [0.5 pts] True or False: The electrons flow from the Ag electrode to the Co electrode. (0 [0.5 pts] True or False: Nitrate ions from the salt bridge flow into the CoCl(aq) solution

Explanation / Answer

a) Co electrode acts as anode

at anode oxidation reaction can takes place

Co -------------------- Co+3 + 3 e-

b) Silver electrode acts as Cathode

at cathode reduction reaction can takes place

    Ag+ + e- ----------------- Ag

C)

at anode       Co ------------------ Co+3 + 3e- oxidation

at cathode [ Ag+ + e- ----------------- Ag] x 3

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

                  Co + 3 Ag+ ------------ CO+3 + 3 Ag          This is net equation

Over all redox reactions is Co + 3 Ag+ ------------ CO+3 + 3 Ag .

d) The reduced substance acts as oxdising agent , i,e Ag+ acts as oxidising agent

The oxidised substance acts as reducing agent i,e Co acts a reducing agent

e) False . electrons flows from anode to cathode in a galvanic cells.i.e electrons flows from Co electrode to Ag electrode,

f ) true.

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