In a galvanic cell, the half-cell having more standard potential serves as ____terminal and that having less standard potential serves as ____terminal.

Answer

To solve the question regarding the terminals in a galvanic cell based on standard potential, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Galvanic Cells**: A galvanic cell consists of two half-cells connected by a salt bridge. Each half-cell contains an electrode and an electrolyte.

2. **Standard Electrode Potential**: Each half-cell has a standard electrode potential (E°). This potential indicates the tendency of a species to be reduced (gain electrons). The more positive the standard potential, the greater the tendency for reduction.

3. **Identifying the Terminals**:
- The half-cell with the **higher standard potential** will serve as the **positive terminal** (cathode). This is because it has a greater tendency to gain electrons and undergo reduction.
- Conversely, the half-cell with the **lower standard potential** will serve as the **negative terminal** (anode). This half-cell will lose electrons and undergo oxidation.

4. **Conclusion**: Therefore, in a galvanic cell, the half-cell having more standard potential serves as the **positive terminal** (cathode), and that having less standard potential serves as the **negative terminal** (anode).

### Final Answer:
In a galvanic cell, the half-cell having more standard potential serves as **positive terminal** and that having less standard potential serves as **negative terminal**.