[I]React with Mg powder

MoS2+2Mg------heat------ Mo+2MgS-------[i]

Mg powder reduces MoS 2 to Mo

[ See 4.64 on page 239 of

Mechanochemistry in Nanoscience and Minerals Engineering

By Peter Balaz]

[II] Now boil the above reaction mixture in water

MgS+H2O----- Mg(OH)2+ H2S -----[]ii]

H2 S leaves; Mg(OH)2 is white turbity. Add dil HCl; boil; it dissolves. Filter.

Solid Mo is left undissolved.

Mg(OH)2+2HCl---- MgCl2+H2 -----[iii]

MgCl2 is soluble while H2 leaves

[III]React solid Mo with HNO3[ page 303; reacts similar to those of Zn, Pb, Ni, Cu]

to form molybdenum nitatrte.