Potassium Salts Essay

INTRODUCTION:

Potassium salts of cyanogens are salts which produced when potassium salts reacted with hydrocyanic acid . hydrocyanic acid is the parent acid of all of potassium salts of cyanogens . it is a weak mono protic acid with a bitter almond odor , it is highly poisonous . any diluted mineral acid can displace HCN from its salt , it is give white p.p.t with silver nitrate and p.p.t is soluble in excess cyanide forming complex [Ag(CN)2]- . potassium salts of cyanogens like potassium cyanide and potassium ferrocyanide .

CONTENT:

1-potassium cyanide

Potassium cyanide is a compound with structure KCN , it is color less crystals salts , its appearance is similar to sugar , it is soluble in water and highly toxic . we obtain KCN by treating HCN by aqueous solution of KOH , or by formamide with KOH .

Dry test :

We make dry test by adding HCl to salt solution then we gain a bitter almond odor of HCN gas , or by adding concentrated sulphuric acid we gain carbon monoxide gas which burns with a blue flame .

Wet test :

Prussian blue test :

When we add salt solution of KCN to fresh ferrous sulphate and boil we gain solution of ferrocyanide then we add Fe 3 then we will gain Prussian blue p.p.t .

Handling ,

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