Preparation of Original Solution (O.S.)

Preparation of Original Solution (O.S.)

Preparation of Original Solution (O.S.)

The strict solvent hierarchy for dissolving unknown salts in wet qualitative analysis.

1. Setup Experiment

Select Unknown Salt

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X

2. Observation

Solubility Undissolved

Status: Standby.
Select a salt. We will follow the strict solvent hierarchy to attempt dissolution.

3. Hierarchy of Solvents

Rule: Proceed to the next solvent ONLY if the salt is insoluble in the current one.

1. Cold Distilled Water
2. Hot Distilled Water
3. Dilute HCl (Shake)
4. Concentrated HCl (Heat)
5. Dilute HNO₃ (Shake)
6. Concentrated HNO₃ (Heat)
7. Aqua Regia (3 HCl : 1 HNO₃) & Heat
8. INSOLUBLE SALT (Requires Fusion)

Visual Key

Solid Salt

Solvent

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