KOCN - POTASSIUM CYANATE

Properties of potassium cyanate:

White, decomposes when heated. It is readily soluble in cold water (hydrolysis on anion), it is steady in the alkaline environment. Doesn't form crystalline hydrates. Decomposes by hot water, strong acids. Reduced with hydrogen. Participates in reactions of an exchange and complex formation.


Molar mass g/mol 81.12
Density g/cm3 2.056

Methods for preparation of potassium cyanate:

KNCS + 10KOH(conc.) + 8KMnO4 = KOCN + 8K2MnO4 + K2SO4 + 5H2O.

2KCN(diluted, cold) + O2 = 2KOCN (catalyst Ni).

KCN + H2O2(conc. 30%) = KOCN + H2O.

KCN + PbO = Pb + KOCN (400-500° C).

K2CO3 + C(NH2)2O = 2KOCN + 2H2O (40° C).


Chemical reactions with potassium cyanate:

4KOCN = 2KCN + K2CO3 + CO + N2 (700-900° C).

KOCN(diluted) + 6H2O(cold) = [K(H2O)6](+) + OCN(-),

OCN(-) + H2O = HOCN + OH(-).

KOCN(conc.) + 2H2O(hot) = time = KHCO3 + NH3↑.

KOCN + HCl(conc.) = HOCN + KCl (normal temp.).

KOCN + H2 = KCN + H2O (500° C).

KOCN + AgNO3 = AgOCN↓ + KNO3,

AgOCN + NH4Cl = AgCl↓ + NH4OCN.

4KOCN(conc.) + ZnCl2 = K2[Zn(OCN)4] + 2KCl.


 

Did you know?

If you slowly pour a handful of salt into a completely full glass of water, it will not overflow. In fact, the water level will go down.