what happens when hcl is added to water aftrr that concsulphuric acid is added and strong base is added
Answers
Answer:
This is mostly the case for sulfuric acid. Commercially available sulfuric acid is dense (~1.8 g/ml) and when water is added, it may not mix. In this case a layer of hot weak acid solution is formed, which boils and sprays around. When acid is poured into water, it flows down the flask and mixes much better, so no boiling occurs.
The reason this occurs is due to the large amount of energy released in the hydration reaction of sulfuric acid ions. Do not believe that heat comes from dissociation, as the dissociation of acids, bases, and salts always consumes energy. The energy is released from subsequent hydration, and the release may be high, especially if H+ or OH− ions are hydrated.
Answer:
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Explanation:
This happens with strong acids and bases. Strong means the acid almost complete dissociates into ions; e.g. HCl to H+ and Cl−. When the dissociation occurs, it releases a great deal of heat (i.e. exothermic) because of the subsequent hydration of H+ to H3O+, as the other comments have indicated. The reason you add acid to water is that if you add water to acid, the first drop of water reacts immediately, and the heat might be high enough to boil the water instantly, which could spray acid out of the container.