Which of the following statement is true for the electrochemical Daniell cell ?

Options

A. Electrons flow from copper electrode to zinc electrode
B. Current flows from zinc electrode to copper electrode
C. Cations move toward copper electrode which is cathode
D. Cations move toward zinc electrode

Explanation

To determine which statement is true for the electrochemical Daniell cell, we can analyze the basic principles and components of the cell.

### Step-by-Step Solution:

1. **Understanding the Daniell Cell**:
- The Daniell cell is an electrochemical cell consisting of two half-cells: one with zinc (Zn) and the other with copper (Cu).
- In this cell, zinc acts as the anode, and copper acts as the cathode.

**Hint**: Remember that the anode is where oxidation occurs, and the cathode is where reduction takes place.

2. **Electron Flow**:
- In the Daniell cell, oxidation occurs at the zinc electrode, where zinc loses electrons and goes into solution as Zn²⁺ ions.
- The electrons released by zinc flow through the external circuit to the copper electrode.

**Hint**: Oxidation involves the loss of electrons, while reduction involves the gain of electrons.

3. **Current Direction**:
- The conventional current flows from the cathode to the anode, which is opposite to the flow of electrons. Therefore, the current flows from the copper electrode (cathode) to the zinc electrode (anode).

**Hint**: Current direction is opposite to electron flow.

4. **Movement of Cations**:
- In the Daniell cell, cations (like Cu²⁺) move towards the cathode (copper electrode) because the cathode is negatively charged. This is due to the accumulation of electrons at the cathode, which attracts positively charged ions.

**Hint**: Cations move towards the negatively charged electrode (cathode).

5. **Conclusion**:
- Based on the analysis, the statement that "cations move towards the copper electrode which is the cathode" is true. This is because cations are attracted to the negatively charged cathode.

### Final Answer:
The true statement for the electrochemical Daniell cell is: "Cations move towards the copper electrode which is the cathode."