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What are the ways to removes water from reaction?

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What are the ways to removes water from reaction?

(a) Superheated steam

(b) Bubbling inert gas

(c) Heating

(d) All of the mentioned

I got this question in semester exam.

The question is from Completing Esterification topic in chapter Esterification of Unit Processes

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The correct answer is (d) All of the mentioned

Explanation: The removal of the water is aided by bubbling an inert gas through the mixture or by the application of a vacuum. When the acid, alcohol, and ester are non-volatile, the mixture is heated, usually to around 200°C or higher, without a catalyst to drive out the water. Another method of removing the water is to pass superheated steam through the mixture; the steam both agitates the mixture and carries off the water as it is formed.

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