Assertion: class's method | /r/CapableOf | involve bubbling h 2 s
Facets:
Source sentences:
text: In addition to direct combination of the elements as a method of preparing sulfides, they can also be produced by reduction of a sulfate by carbon or by precipitation from acidic aqueous solution by hydrogen sulfide, H 2 S, or from basic solution by ammonium sulfide, (NH 4 ) 2 S. Another method, particularly suitable for water-soluble sulfides, involves bubbling H 2 S into a basic solution of the metal to give the metal hydrogen sulfide, MHS.