Problem: For the following electrochemical cell Co(s)|Co2+(aq, 0.0155 M)||Ag+(aq, 2.50 M)|Ag(s) write the net cell equation. Phases are optional. Do not include the concentrations. Calculate the following values at 25.0 °C using standard potentials as needed. E°cell = ____ V                                  ΔG°rxn = ____ kJ/molE°cell = ____ V                                  ΔG°rxn = ____ kJ/mol

FREE Expert Solution

Step 1: Balanced equation and the number of electrons

When writing a cell notation, we use the following format – “as easy as ABC

 


Recall the mnemonics LEO GER.

Lose               Gain

Electron         Electrons

Oxidation       Reduction


lose electrons → oxidation → anode

gain electrons → reduction → cathode


We’re going to write the overall balanced reaction equation using the following sub-steps:

Sub-step 1: Write the anode reaction.

Sub-step 2: Write the cathode reaction.

Sub-step 3: Balanced anode and cathode reactions.

Sub-step 4: Get the overall reaction.

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Problem Details

For the following electrochemical cell 

Co(s)|Co2+(aq, 0.0155 M)||Ag+(aq, 2.50 M)|Ag(s) 

write the net cell equation. Phases are optional. Do not include the concentrations. 

Calculate the following values at 25.0 °C using standard potentials as needed. 

cell = ____ V                                  ΔG°rxn = ____ kJ/mol

cell = ____ V                                  ΔG°rxn = ____ kJ/mol

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Cell Potential concept. If you need more Cell Potential practice, you can also practice Cell Potential practice problems.