Question

FeCl3-->Fe2[Fe(CN)6]

Answer 1

4FeCl3 + 3K4[Fe(CN)6] = 12 KCl +  Fe4[Fe(CN)6]3 - гексоцианоферрат (II) железа III или берлинская лазурь
КАЖЕТЬСЯ ТАК 

Answer 2

The balanced chemical equation for the reaction you provided is:

2FeCl₃ + 3K₄Fe(CN)₆ → Fe₂[Fe(CN)₆]₃ + 6KCl

In this reaction, iron(III) chloride (FeCl₃) reacts with potassium ferrocyanide (K₄Fe(CN)₆) to form ferric hexacyanoferrate(II), also known as Prussian blue (Fe₂[Fe(CN)₆]₃), and potassium chloride (KCl) as a byproduct.