KCl, `KNO_(3)` etc. are preferred in a salt bridge because they have equal____.

Explanation

To solve the question, we need to fill in the blank regarding why KCl, KNO₃, and similar salts are preferred in a salt bridge.

### Step-by-Step Solution:

1. **Understanding Salt Bridge**: A salt bridge is a device used in electrochemical cells to connect the oxidation and reduction half-cells. It allows the flow of ions, which maintains electrical neutrality in the half-cells.

2. **Role of Electrolytes**: The salt bridge contains electrolytes, which are substances that dissociate into ions in solution. Common examples include KCl and KNO₃.

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