what is acid
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Answers
Answer:
Acid, any substance that in water solution tastes sour, changes the colour of certain indicators (e.g., reddens blue litmus paper), reacts with some metals (e.g., iron) to liberate hydrogen, reacts with bases to form salts, and promotes certain chemical reactions (acid catalysis).
Answer:
A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind.
Properties of Acids
● Aqueous solutions of acids are electrolytes, meaning that they conduct electrical current.
● Acids have a sour taste.
● Acids change the color of certain acid-base indicates.
● Acids react with active metals to yield hydrogen gas.
● Acids react with bases to produce a salt compound and water.
Types of acid
Acids are compounds that dissociate in water to donate hydrogen ions/protons or to accept electrons.
● Acetic Acid.
● Boric Acid.
● Carbonic Acid.
● Citric Acid.
● Hydrochloric Acid.
● Hydrofluoric Acid.
● Nitric Acid.
● Oxalic Acid.
Pka
The pKa value is one method used to indicate the strength of an acid. pKa is the negative log of the acid dissociation constant or Ka value. A lower pKa value indicates a stronger acid. That is, the lower value indicates the acid more fully dissociates in water.
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