Advertisements
Advertisements
Question
Give reason for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitatre should not be heated very strongly, above 200°C
Advertisements
Solution
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly, above 200°C because a higher temperature can cause following problems:
1. Nitric acid would decompose to form nitrogen dioxide.
2. Sodium sulphate is formed which may stick to the glass and cannot be removed easily.
3. The glass apparatus may break.
APPEARS IN
RELATED QUESTIONS
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of Nitric acid?
Give two chemical equations for the following:
Reactions of nitric acid with non-metals.
Name a metal nitrate which on heating is changed into metal.
What is the purpose of Conc. H2SO4 in the above preparation?
Give reason for the following:
Lighting is a blessing in disguise.
Write balanced equation and name the product formed when :
Sodium hydrogen carbonate is added to nitric acid.
Choose the correct answer from the option given below :
Nitric acid on standing develops brownish colour which may be attributed to the presence of :
Fill in the blank with appropriate word/words.
Ammonal is a mixture of ________ and __________
Explain why nitric acid is kept in a reagent bottle for a long time.
