Dilute H2SO4 Test Simulator

Preliminary Test: Dilute H₂SO₄

Qualitative Salt Analysis - Identifying Acidic Radicals (Anions) via Gas Evolution.

1. Setup Experiment

Select Unknown Salt

Sodium Carbonate (CO3 2-) Sodium Nitrite (NO2 -) Sodium Sulfide (S 2-) Sodium Chloride (Cl -) [Control]

2. Observation

Visible Gas/State None

Status: Standby.
Select a solid salt. Dilute Sulfuric Acid will be added. Observe the evolution of gas, its color, and any associated odors.

3. Chemical Principles

Dilute Acid Group: Includes Carbonate, Sulfide, Sulfite, Nitrite, and Acetate.

Dilute acids decompose these salts to produce characteristic gases. If no gas evolves at room temperature or gentle warming, the anion belongs to the concentrated acid group or independent group.

⚠️ ROTTEN EGG ODOR DETECTED ⚠️

Visual Key

Solid Salt

Dilute H₂SO₄ Liquid

Effervescence (Colorless Gas)

Brown Fumes

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