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Largely produced in petroleum refining as a impurity.Inhaling in very low concentrations is enough to death. H 2S can be identified by blackening of paper moistened with a solution of lead acetate.H 2S has a characteristic smell of rotten eggs.It is importnat to know the several characteristics of Hydrogen sulfide gas. You can see the purple colour.īecause many metal sulfide compounds has the capability of releasing Hydrogen sulfide gas in a contact of water or moisture, Sulfide solution to make the solution alkaline. Test for sulfide ion: With sodium nitroprusside solutionĪdd little bit of Sodium hydroxide to aqueous It gives black Silver sulfide precipitate which is notīut it will dissolve in concentrated nitric acid. Test for sulfide ion: Silver nitrate and aqueous sulfide solutionĪdd silver nitrate to aqueous sulfide solution. Barium sulfide (BaS): White solid and hydrolysis in water.Sulfide (SrS): White solid, slightly soluble in water Calcium sulfide (CaS): White solid and hydrolysis to Hydrogen sulfide gas.Magnesium sulfide (MgS): White (in pure form) to reddish brown powder, MgS decomposes to Hydrogen sulfide gas and.Berrylium sulfide (Bes): White solid, in the presence of water, it decomposes.Sulfides of alkali earth metals: colour, physical state and water solubility Potassium sulfide (K 2S): Colourless, because of K 2S readily reacts with water, it is rarely.Sodium sulfide (Na 2S) : Has a rotten eggs smell.Lithium sulfide (Li 2S) : yellow-white deliquescent powder and readily hydrolysis to hydrogen sulfide.Sulfides of alkali metal: colour, physical state and water solubility Here we are going to learn some s block sulfide compounds their characteristics. You cannot see a colour when you dissolve sodium Therefore, you are unable to identify two s block metal sulfides by dissolving in water. Also, these s block metal sulfide emits Hydrogen sulfide gas when metal sulfides are hydrated. Most of s block metal sulfides (except Strontium sulfide) are soluble in water and hydrolysis to alkaline aqueousĬolourless solutions releasing Hydrogen sulfide gas. Important to learn sulfides of those metal cations when identify sulfide compounds. There are two groups as alkali metals and