The chemical equation is Sn + BaSO4 -> BaSnO3 + BaS

1. Detailed information about the reaction Sn + BaSO₄ -> BaSnO₃ + BaS

The above equation describes the chemical reaction process between tin (Sn) and barium sulfate (BaSO₄) to form barium stannate (BaSnO₃) and barium sulfide (BaS).

2. Conditions for the reaction

   This reaction requires high temperature and high pressure to proceed. Additionally, the presence of a catalyst is needed for the reaction to occur effectively.

3. The reaction process

Tin has the ability to react with barium sulfate to produce barium stannate and barium sulfide. In this process, tin is oxidized from the oxidation state +2 to +4, while barium is reduced from the oxidation state +6 to +4.

4. The phenomenon occurs

During the reaction process, tin and barium sulfate are mixed together in a high temperature and high pressure environment, resulting in changes in color and shape due to the formation of barium stannate and barium sulfide.