The equation 4HNO3 + 5H2S -> 4H2SO4 + 4NO + 6H2O

1. Detailed information about the equation 4HNO₃ + 5H₂S -> 4H₂SO₄ + 4NO + 6H₂O:

This equation describes the reaction between nitric acid (HNO₃) and hydrogen sulfide (H₂S) to produce sulfuric acid (H₂SO₄), nitric monoxide gas (NO), and water (H₂O).

2. Reaction conditions:

The reaction occurs under normal catalyst, temperature and pressure conditions.

3. Reaction process:

When nitric acid (HNO₃) reacts with hydrogen sulfide (H₂S), it produces sulfuric acid (H₂SO₄), nitric monoxide gas (NO), and water (H₂O). In this process, HNO₃ acts as an oxidant, while H₂S acts as a reductant.

4. Phenomena occurring:

During the reaction process, nitric monoxide gas (NO – blue) will be formed, along with the production of sulfuric acid (H₂SO₄ – a colorless liquid) and water (H₂O).