5 Questions
What color precipitate forms when thiocyanate (SCN-) reacts with SnCl2 and Co(NO3)2?
Prussian blue
Which compound liberates toxic gas HCN when reacting with SnCl2?
Thiocyanate (SCN-)
What color does the wet reaction of S.S with Magnesia mix produce in the presence of phosphate (PO3-4)?
Chocolate brown ppt
What color does the wet reaction of S.S with AgNO3 solution produce in the presence of arsenate (AsO43-)?
Yellow ppt on cold
What color does the dry test of NO2 - powder with dil. HCl produce?
Brown fumes
Study Notes
Chemical Reactions and Precipitates
- Thiocyanate (SCN-) reacts with SnCl2 and Co(NO3)2 to form a red precipitate.
- Thiocyanate (SCN-) liberates toxic gas HCN when reacting with SnCl2.
- The wet reaction of Sulfide (S.S) with Magnesia mix in the presence of phosphate (PO3-4) produces a white color.
- The wet reaction of Sulfide (S.S) with AgNO3 solution in the presence of arsenate (AsO43-) produces a yellow color.
- The dry test of NO2 - powder with dil. HCl produces a brown color.
Test your knowledge on identifying anions in analytical chemistry through dry and wet reactions, as well as Vogal's test. This quiz covers the reactions and results for thiocyanate, ferrocyanide, and ferricyanide anions.
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