The process that you saw in Activity 14.7 is used for purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of the battery and why?

Explanation

To determine which electrode should be attached to the positive terminal of the battery in the process of purifying copper, follow these steps:

### Step-by-Step Solution:

1. **Identify the Electrodes**: We have two electrodes: a thin plate of pure copper and a thick rod of impure copper.

2. **Understand the Process**: The goal is to transfer copper from the impure copper rod to the pure copper plate. This process is known as electrolysis.

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