PH-PHR 327L Quiz No. 3 SS 2022-2023

Its sulfide salt dissolves in concentrated HCl.

• Mercury

• Tin

• Antimony

• Cobalt

• Iron

Gives dark colored precipitates with tannic acid.

• Cobalt

• Iron

• Tin

• Mercury

• Antimony

Gives blue precipitate in addition of ammonium hydroxide. Turns to cyan upon addition of excess reagent.

• Cobalt

• Iron

• Mercury

• Tin

• Antimony

Gives an orange red precipitate when sodium or hydrogen sulfide is added.

• Cobalt

• Antimony

• Mercury

• Iron

• Tin

Gives a brown gelatinous precipitate with ammonia or alkali hydroxides.

• Tin

• Mercury

• Cobalt

• Antimony

• Iron

Gives a blood red colored solution in addition of ammonium thiocyanate.

• Iron

• Cobalt

• Mercury

• Tin

• Antimony

Gives a purple precipitate upon addition of sodium carbonate TS.

• Cobalt

• Iron

• Antimony

• Mercury

• Arsenic

Gives a yellow precipitate in addition of sodium hydroxide TS.

• Mercury

• Antimony

• Arsenic

• Tin

• Cobalt

Gives intense blue precipitate in addition of potassium ferricyanide.

• Cobalt

• Iron

• Mercury

• Antimony

• Tin

True or False: In formation of tin (II) hydroxide, it is insoluble of the excess reagent (sodium hydroxide).

• True

• False