Question Video: Recalling the Type of Substance That Causes Certain Foods and Drinks to Be Sour | Nagwa Question Video: Recalling the Type of Substance That Causes Certain Foods and Drinks to Be Sour | Nagwa

Question Video: Recalling the Type of Substance That Causes Certain Foods and Drinks to Be Sour Science • First Year of Preparatory School

Cola, lemon juice and vinegar all have sour tastes. Which type of substance causes sourness when present in food and drinks?

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Video Transcript

Cola, lemon juice, and vinegar all have sour tastes. Which type of substance causes sourness when present in food and drinks?

Cola, lemon juice, and vinegar all have sour tastes, but the sourness is not due to the same compound. The sourness in cola is due to a substance called carbonic acid. Lemon juice is sour because of a chemical called citric acid. And vinegar tastes sour because of a compound called acetic acid. While these chemicals aren’t exactly the same, they’re all from the same class of substances called acids.

An acid is a substance that dissociates in water to produce positive hydrogen ions. Acids are characterized by their sour taste. Other examples of foods and drinks that contain acids are yogurt, coffee, and blueberries.

In conclusion, the type of substance that causes sourness when present in food and drinks is an acid.

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