Respuesta :
As H₃O⁺ represents the presence of an acid, blue litmus will turn red in its presence.
What are Acid ?
Acids are very common in some of the foods that we eat. Citrus fruits such as oranges and lemons contain citric acid and ascorbic acid, which is better known as vitamin C.
Carbonated sodas contain phosphoric acid. Vinegar contains acetic acid. Your own stomach utilizes hydrochloric acid to digest food.
Properties of Acid
- Some acids are strong electrolytes because they ionize completely in water, yielding a great many ions.
- Acids have a sour taste. Lemons, vinegar, and sour candies all contain acids.
- Acids change the color of certain acid-base indicates. Two common indicators are litmus and phenolphthalein. Blue litmus turns red in the presence of an acid, while phenolphthalein turns colorless.
(NH₄)₂SO₄ dissociates in water to release the ions of the salt.
(NH₄)₂SO₄ in water ——-> 2NH₄⁺ + SO₄²⁻
The NH₄⁺ reacts in water as an acid/base reaction.
NH₄⁺+ H2O ——-> NH₃ + H3O⁺
As H3O⁺ represents the presence of an acid, blue litmus will turn red in its presence.
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