Table of Contents
- 1 Why do we boil the extract with conc HNO3 in Lassaigne test?
- 2 Why is sodium extract boiled with HNO3 before adding agno3?
- 3 Why is sodium extract boiled with conc HNO3?
- 4 Why is sodium extract used for element detection?
- 5 What is the role of sulfuric acid in nitration?
- 6 Why is it necessary to boil sodium extract with concentrated HNO3?
- 7 What is the use of dilute HNO3 in sodium fusion extract?
- 8 How to detect halogen in organic compounds using AgNO3 solution?
Why do we boil the extract with conc HNO3 in Lassaigne test?
Explanation: In case of Lassaigne’s test of halogens, it is necessary to remove sodium cyanide and sodium sulphide from the sodium extract if nitrogen and sulphur are present. This is done by boiling the sodium extract with conc. HNO3.
Why is sodium extract boiled with HNO3 before adding agno3?
HNO3 is added to sodium extract before adding silver nitrate for testing halogens, to decompose any NaCN or Na2S if present.
What is the role of HNO3 in halogen test?
In the test of halogens from sodium extract, a small amount of dilute HNO3 is added. Nitric acid decomposes sodium cyanide and sodium halide. else, they precipitate in test and misguide the result.
Why is sodium extract boiled with conc HNO3?
It is boiled with concentrated nitric acid to decompose any sodium cyanide or sodium sulphide present in the compound containing nitrogen or sulphur also.
Why is sodium extract used for element detection?
In order to detect them, the elements need to be converted into their ionic forms. This is done by fusing the organic compound with sodium metal. The ionic compounds formed during the fusion are extracted in aqueous solution and can be detected by simple chemical tests.
Why do you prepare sodium extract?
For the confirmatory analysis of acidic radicals we use the soda extract or sodium carbonate extract. It is prepared when the given inorganic compound is insoluble in water.
What is the role of sulfuric acid in nitration?
Sulfuric acid is needed in order for a good electrophile to form. Sulfuric acid protonates nitric acid to form the nitronium ion (water molecule is lost). The nitronium ion is a very good electrophile and is open to attack by benzene.
Why is it necessary to boil sodium extract with concentrated HNO3?
Originally Answered: why it is necessary to boil sodium extract with concentrated HNO3 before detecting halogens? Dilute HNO3 is added to the sodium fusion extract {Lassaigne’s extract} for the removal of ions particularly Cyanides, Carbonates and sulphides these ions also give ppt with silver nitrate AgNO3 soloution.
How to detect halogen in organic compounds using sodium fusion extract?
To avoid this interfering we boil sodium fusion extract with HNO3 and then cool it. Now we can use AgNO3 solution for detection of halogen in organic compounds.
What is the use of dilute HNO3 in sodium fusion extract?
Dilute HNO3 is added to the sodium fusion extract { Lassaigne’s extract} for the removal of ions particularly Cyanides, Carbonates and sulphides these ions also give ppt with silver nitrate AgNO3 soloution. To avoid this interfering we boil sodium fusion extract with HNO3 and then cool it.
How to detect halogen in organic compounds using AgNO3 solution?
Now we can use AgNO3 solution for detection of halogen in organic compounds. Dilute HNO3 is added to the sodium fusion extract { Lassaigne’s extract} for the removal of ions particularly Cyanides, Carbonates and sulphides these ions also give ppt with silver nitrate AgNO3 soloution.