The equation 4HNO3 + SnS2 -> 2NO2 + 2H2O + Sn(NO3)4 + S

The chemical equation 4HNO₃ + SnS₂ -> 2NO₂ + 2H₂O + Sn(NO₃)₄ + SdescribestheoxidationprocessofSnS₂(tin(IV)sulfide)inconcentratednitricacidHNO₃solution.

Reaction conditions:

• This reaction occurs at room temperature and standard pressure.
• SnS₂ needs to be introduced into a concentrated nitric acid solution.

Reaction process:

• SnS₂ reacts with HNO₃ to produce Sn(NO₃)₄, NO₂, H₂O and S.
• The reaction process occurs at a mole ratio of 4:1 between HNO₃ and SnS₂.

Phenomena that occur:

• When SnS₂ is introduced into nitric acid HNO₃ solution, the solution will boil and emit brownish-red NO₂ gas.
• Simultaneously, there is a white precipitation of Sn(NO₃)₄ and a large amount of sulphur S is produced.