Why do we Prefer HCl for preparing solution of cations?

Explanation

### Step-by-Step Solution:

1. **Understanding the Role of HCl**: Hydrochloric acid (HCl) is a strong mineral acid commonly used in qualitative inorganic analysis. It is important to note that HCl is used to prepare solutions of cations.

2. **Solubility of Cations**: Most cations are soluble in dilute HCl. This includes common cations such as Mn²⁺, Ca²⁺, and Zn²⁺. The solubility of these cations in HCl allows for their detection and analysis in qualitative tests.

3. **Exceptions to Solubility**: There are exceptions to this solubility rule. Specifically, the cations Ag⁺ (silver), Pb²⁺ (lead), and Hg₂²⁺ (mercurous) are not soluble in dilute HCl. Instead, they form precipitates when HCl is added to their solutions.

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