Concentrated H2SO4 Test Simulator

Preliminary Test: Conc. H₂SO₄

Qualitative Salt Analysis - Identifying Acidic Radicals (Cl⁻, Br⁻, I⁻, NO₃⁻) via Gas Evolution.

1. Setup Experiment

Select Unknown Salt

Sodium Chloride (Cl⁻) Sodium Bromide (Br⁻) Potassium Iodide (I⁻) Sodium Nitrate (NO₃⁻) Sodium Sulfate (SO₄²⁻) [Control]

2. Observation

Visible Gas/Fumes None

Status: Standby.
Select a solid salt. Thick, concentrated Sulfuric Acid will be added and gently heated. Caution: Corrosive and oxidizing!

3. Chemical Principles

Concentrated Acid Group: Includes Chloride, Bromide, Iodide, Nitrate, and Oxalate.

Displacement & Oxidation: Conc. H₂SO₄ is a strong, non-volatile acid that displaces volatile acids (like HCl or HNO₃) from their salts. For Br⁻ and I⁻, H₂SO₄ also acts as an oxidizing agent, oxidizing them to free Br₂ (brown gas) and I₂ (violet gas).

Visual Key

Solid Salt

Viscous Conc. H₂SO₄

Colored Fumes (Variable)

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