ácido vs agrio

21:04 Feb 22, 2022 

Well, some others don' t think that I "have missed the point". I'll go along with them and my translation. "Acidic", more than just a bit, implies that the drink or sauce would taste "bitter". Off to cook my dinner, which I will wash down with some acidic, but not very bitter coffee! Cheers!

20:50 Feb 22, 2022 

The very first entry for "amargo" in the DRAE:

"amargo, ga
De amaro2, infl. por amargar.

1. adj. Que tiene el sabor característico de la hiel, de la quinina y otros alcaloides; cuando es especialmente intenso, produce una sensación desagradable y duradera."
https://dle.rae.es/amargo

I've read the link and I believe it's actually you that's missed the point here. The only translation of "agrio" as "bitter" there refers to an emotional state (Agrio por el dolor y dulce por la salvación. > Bitter in the pain, sweet in the salvation.). "Agrio" could be translated as "bitter" in this case but that's because of how we use those terms differently as metaphors in each language, i.e., "bitter-sweet" in English, but "agridulce" in Spanish; whereas, as Cecilia rightly says, the flavour "agridulce" in Spanish translates as "sweet and sour" in English.

So, I will concede to you that the word "agrio" does appear to cause some confusion, but that's no reason to continue confusing it taste-wise with "amargo", which is entirely different. As I say, the fact that a lemon tastes both acidic and bitter probably has something to do with it.

19:01 Feb 22, 2022 

Totally agree with slothm's excellent explanation below. I would just add that lemons are generally both tart (or acid/sour/sharp) AND bitter. The acid part is the fruit; the bitter part is the rind.

08:45 Feb 22, 2022 

Muchas Gracias Slothm.

20:07 Feb 21, 2022 

Divague constructivo.

Básicamente creo que no hay diferencia entre el efecto organoléprtico de ambos términos. Ambas sensaciones son detectadas por las mismas papilas gustativas.

Si hay diferencia es por el uso, es decir que depende del contexto.

Por ejemplo, cuando se corta la leche decimos que se puso agria, si dejamos el caldo fuera de la nevera y se echa a perder decimos que se vuelve agrio.
Pero el limón es ácido como también el vinagre (expresión francofona, vin aigre).
La fruta sin madurar generalmente decimos que está ácida.

Personalmente asocio a "agrio" cuando un alimento se ha pasado por efecto de bacterias o levaduras.

También dependerá del idioma.