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Question
While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?
Solution 1
Since the process of dissolving an acid in water is exothermic, it is always recommended that acid should be added to water. If it is done the other way, then it is possible that because of the large amount of heat generated, the mixture splashes out and causes burns.
Solution 2
- Diluting is a process that involves adding concentrated acid to the water. The concentrated water will be added gradually by stirring.
- There is heat that is evolved slowly and gradually so that concentrated acid is added because diluting acid easily absorbs large quantity of water.
- If it happens in the other way by adding water to diluted acid the amount of heat evolved is all don’t at once and not gradually. This may cause a splash and could end up in acid burn.
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