1. When we mix water and strong acid, the order of adding should be like \"acid

Question

1. When we mix water and strong acid, the order of adding should be like "acid TO water".

What if two strong acids are mixed? such as nitric acid and sulfuric acid?

What is the order of addition?

2. In synthesis of 4-bromoacetanilide at the end, we should dry the purified product in order to remove excess water.

Here, we put it in a desiccator for 24hrs. But, other than this procedure, what is the best way to dry the product in a short time??

3. For synthesis of 4-bromo-2-nitroaniline, We analyze TLC after adding HCl to 4-bromo-2-acetaniline.

Here, we cannot just spot the reactio mixture on TLC plate without doing some workup of an aliquot, which is an addition ether and mixing the organic layer.

So, why do we have to do this procedure?

Explanation / Answer

1. When acid is added to water, the water is present in large quantities but acid is added in smaller quantities. Hence less heat is released from hydration. If water is added to acid, lot of heat is released and it is dangerous. Same way, sulphuric acid is a stronger acid than nitric acid. Addition of nitric acid to sulphuric acid is highly exothermic. To prevent this, sulphuric acid is added to nitric acid.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.