10 Questions
What is the purpose of using the Carius method in organic compound analysis?
To determine the presence of halogens
In the Kjeldahl method, what does the neutralization of 10 mL of 1 M H2SO4 by ammonia indicate?
Percentage of nitrogen in the compound
What is the significance of titrating unreacted sulfuric acid with standard alkali solution in halogen estimation?
To estimate halogen levels
What is the purpose of using an oxidising agent (sodium peroxide) when testing for phosphorus in a compound?
To oxidise the phosphorus to phosphate
In the silver nitrate test for halogens, why do interfering ions need to be removed before conducting the test?
Interfering ions can cause false positive results
How is the presence of phosphorus indicated after boiling the solution with nitric acid and treating it with ammonium molybdate?
A yellow colouration or precipitate
Why are carbon and hydrogen estimated together in one experiment in organic compound analysis?
To reduce the number of experiments needed
In the Carius method, what happens when a halogen-containing organic compound is heated with fuming nitric acid in the presence of silver nitrate?
The halogen gets oxidized to form the corresponding silver halide.
What is the purpose of heating a halogen-containing organic compound with fuming nitric acid in the presence of silver nitrate in the Carius method?
To oxidize the halogen to form the corresponding silver halide.
How is the percentage of halogen calculated in the Carius method for halogen estimation?
$\frac{\text{atomic mass of X} \times m1}{\text{molecular mass of AgX} \times m} \times 100$
Test your understanding of Kjeldahl method calculations for nitrogen determination based on given chemical reactions and equations. Calculate the amount of nitrogen in NH3 solution of a specific molarity using the provided formula.
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