The exhausted permutit contains ______ and ______ ions in place of `Na^(+)` ions.

Explanation

To answer the question about the exhausted permutit, we need to identify the ions that replace the sodium ions (Na⁺) during the ion exchange process.

### Step-by-Step Solution:

1. **Understanding Permutit**: Permutit is a type of zeolite that is used in water softening. It works by exchanging sodium ions (Na⁺) in the water with other ions.

2. **Ion Exchange Process**: During the ion exchange process, when permutit is exhausted, the sodium ions (Na⁺) are replaced by other cations present in the water.

3. **Identifying the Ions**: The common ions that replace Na⁺ in exhausted permutit are calcium ions (Ca²⁺) and magnesium ions (Mg²⁺).

4. **Final Answer**: Therefore, the exhausted permutit contains **calcium (Ca²⁺)** and **magnesium (Mg²⁺)** ions in place of Na⁺ ions.

### Complete Answer:
The exhausted permutit contains **calcium (Ca²⁺)** and **magnesium (Mg²⁺)** ions in place of Na⁺ ions.

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