K 4 Fe(CN) 6 solution will form poisonous hydrogen cyanide (HCN) gas if added to
ID: 715690 • Letter: K
Question
K4Fe(CN)6solution will form poisonous hydrogen cyanide (HCN) gas if added to what type of solution?
What solution is added to precipitate the Fe3+ ions?
What solution is added to separate the iron and aluminum compounds? Which one precipitates and which one remains in solution?
What cation precipitates when HCl is added?
Why are precipitates usually rinsed with distilled water before they are tested further?
A student did experiment 1 and saw the following results. Upon adding HCl to the unknown mixture, there was a white precipitate. Then upon addition of the ammonia solution, there was no precipitate. When (NH4)2C2O4 is added, a white precipitate forms. Nitric acid is added to the solution, and this is dried. The residue is reconstituted in a hydrochloric acid solution, and then sodium hydroxide is added. Upon heating a precipitate forms. The solution turns yellow upon addition of Na3Co(NO2)6.
What cations are present in the unknown?
Explanation / Answer
K4Fe(CN)6solution will form poisonous hydrogen cyanide (HCN) gas if added to what type of solution?
acid solution of mineral acid HCL
K4[Fe(CN)6] + 6 HCl = 6 HCN + 4 KCl + FeCl2
What cation precipitates when HCl is added?
Ferrous
Why are precipitates usually rinsed with distilled water before they are tested further?
to remove alkai metal cations
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.