Question

Iron Yellow: FeSO4 (aq)+ K2C2O4 (aq)The product is also known as the mineralHumboldtine.Names: and Colors: and Species Initially Present:Evidence of Reaction: Name and Balanced Net Ionic Equation for Precipitation:

Answer 1

FeSO₄ + 2K₂C₂O₄ → K₂[Fe(C₂O₄)₂] + K₂SO₄

Iron(II) sulfide react with potassium oxalate to produce potassium dioxalatoferrate(II) and potassium sulfate.

The mineral Humboldtine has the formula Fe²⁺(C₂O₄). 2H₂O

The color of the mineral is yellow to amber yellow.

It is a rare authigenic organic mineral occuring on fracture surfaces in coal deposits and rarely in granitic pegmatites and hydrothermal mineral deposits.