Name the complex `K_(2)[Cu(CN)_(4)]`.

Explanation

To name the complex \( K_2[Cu(CN)_4] \), we will follow the systematic approach for naming coordination compounds according to IUPAC rules. Here are the steps:

### Step-by-Step Solution:

1. **Identify the Components**:
- The complex consists of potassium ions (\( K^+ \)) and the coordination complex \( [Cu(CN)_4]^{2-} \).
- Potassium is a cation, while the copper complex is an anion.

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