Question

What additions must you make to the cell for it to generate a standard emf? Select all that apply.

1. You should add enough salt containing A2+ into the glass containing the electrode B(s) to produce a 1 M A2+ solution.
2. You should add enough salt containing B2+ into the glass containing the electrode B(s) to produce a 1 M B solution.
3. You should apply the initial emf to the electrodes.
4. You should add the salt bridge.
5. You should add enough salt containing A2+ into the glass containing the electrode A(s) to produce a 1 M A2 solution.
6. You should add enough salt containing B2+ into the glass containing the electrode A(s) to produce a 1 M B2+ solution.

Answer 1

To generate a standard emf in a galvanic cell, one must add a 1 M solution of the respective ions A2+ and B2+ to the beakers containing their corresponding electrodes A(s) and B(s) and include a salt bridge to complete the circuit and maintain charge balance.

Step-by-step explanation:

For a cell to generate a standard electromotive force (emf), specific conditions need to be met. Particularly, certain additions to the electrochemical cell are required:

• You must add enough salt containing A2+ into the glass containing the electrode A(s) to produce a 1 M A2+ solution.
• You should add enough salt containing B2+ into the glass containing the electrode B(s) to produce a 1 M B2+ solution.
• Include a salt bridge as a crucial component of the galvanic cell to maintain electrical neutrality by allowing ions to flow between the two half-cells, preventing the solutions from mixing, and stopping the buildup of charge that would otherwise halt the cell's reactions.

Only these components are necessary for the standard operation of a galvanic cell. An initial emf does not need to be applied, as the cell operates based on the spontaneous redox reactions between the two electrodes.