The equation Fe(NO3)2 + 3K2S -> 3K2NO3 + Fe2S3

1. Detailed information about the equation Fe(NO₃)₂ + 3K₂S -> 3K₂NO₃ + Fe₂S₃:

This chemical equation describes the reaction between iron(II) nitrate (Fe(NO₃)₂) and potassium sulfide (K₂S), which produces potassium nitrate (K₂NO₃) and iron(III) sulfide (Fe₂S₃).

2. Reaction conditions:

It is an ion exchange reaction that requires a sufficient electrolyte solution environment to occur.

3. The reaction process:

• When iron(II) nitrate and potassium sulfide combine, they form a mixture containing potassium nitrate and iron(III) sulfide.
• Specifically, one molecule of iron(II) nitrate reacts with three molecules of potassium sulfide to produce three molecules of potassium nitrate and one molecule of iron(III) sulfide.

4. Observed phenomenon:

When the reaction occurs, we can observe a color change in the solution from colorless (or slightly pink due to iron(II) nitrate) to the brick red color of iron(III) sulfide.