AP BIOLOGY

Detailed explanation-1: -Acidic compounds are believed to taste sour because of their hydrogen ion concentration, whereas many bases are bitter compounds & are indeed alkaline, but this is because natural bitter compounds often contain amine groups. Amine groups are weak bases. Acids taste sour, and this is because of the pH.

Detailed explanation-2: -The sour taste of foods and beverages is largely due to organic acids, including acetic, citric, malic, and fumaric acids in fruits and vegetables and tartaric acid in wine. Dilute solutions of many inorganic acids also taste sour. One example is the phosphoric acid in cola beverages.

Detailed explanation-3: -Acidic Foods have a Sour Taste – If you’ve ever tasted a lemon, you’ve had firsthand experience with the sour taste of acids. Citrus fruits, such as lemons, grapefruit, and oranges, all contain citric acid. Other foods such as vinegar and tomatoes also contain acids.

Detailed explanation-4: -What do lemons and vinegar have in common? They both taste sour on your tongue. This is because they are acids and acids taste sour. Bases are the opposite of acids; they normally taste bitter and feel soapy.

Detailed explanation-5: -Like strong acids, weak acids release hydrogen ions that pass through proteins in the cell membrane, triggering a sour sensation.