Question

Why should water be never added drop wise to conc. H2so4?

Answer 1

Answer:because it evolves a large amount of heat which can even break the beaker and cause severe burns.

Explanation:the reaction between water and sulphuric acid is highly exothermic reaction. It can even break the beaker. Thus, to prevent any accident sulphuric acid should be added drop by drop to water and not water to acid cause while doing this the amount of heat evolved is so small that it doesn't causes any mahor change in the temperature.

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Answer 2

Explanation:

This is because the reaction between acid and water is highly exothermic and produces an enormous amount of heat.

Hence, when water is added to acid, it results in vigorous boiling of the solution and the amount of heat produced is so large that it splashes the acid out of the container, which can result in acid burns.

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