Question

1. Why the concentrated solution should not be heated for a long time?
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Answer 1

Explanation:

Solution. The temperature of the mixture of concentrated sulphuric acid and sodium nitrate should not exceed 200oC because sodium sulphate formed at higher temperature forms a hard crust which sticks to the walls of the retort and is difficult to remove. At higher temperature nitric acid may also decompose.

Answer 2

Answer:

1. The concentrated solution is stronger than other normal solution.

2. If they had been heated for a long time there may be chances to increase their strongness and make them highly concentrated which can be hardest to handle.

3. Also by heated them for long time, they can convert into a hard sticky form which can stick to wall of vessels and harder to be remove.

Hence, concentrated solution shouldn't heated for a long time...

Explanation:

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