Sourness or tartness is one of the five major taste sensations: sour, salty, sweet, bitter, and umami (the most recently determined). Unlike the sensations of sweetness and bitterness, which can be developed by a variety of molecular structures, sourness is evoked only by the hydronium ion of acidic compounds.

Has a sour taste acid or base?

Acids generally taste sour due to the sour H+ ion; bases taste bitter due to the OH- ion; but they may have other tastes depending on the other part of the molecule. Bases are usually soapy in nature.

What food has a sour taste?