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Citric acid is a tribasic acid, with pK a values, extrapolated to zero ionic strength, of 3.128, 4.761, and 6.396 at 25 °C. [21] The pK a of the hydroxyl group has been found, by means of 13 C NMR spectroscopy, to be 14.4. [22] The speciation diagram shows that solutions of citric acid are buffer solutions between about pH 2 and pH 8. In ...
Acids are broken down in ripening fruits [12] and this contributes to the sweeter rather than sharp tastes associated with unripe fruits. In some fruits such as guava, there is a steady decrease in vitamin C as the fruit ripens. [13] This is mainly as a result of the general decrease in acid content that occurs when a fruit ripens. [9]
The tree's yellow fruit is used throughout the world, primarily for its juice. The pulp and rind are used in cooking and baking. The juice of the lemon is about 5–6% citric acid, giving it a sour taste. This makes it a key ingredient in drinks and foods such as lemonade and lemon meringue pie. The fruits have appeared in art since the time of ...
The fragrance of citrus fruits is conferred by flavonoids and limonoids in the rind. The flavonoids include various flavanones and flavones. [28] The carpels are juicy; they contain a high quantity of citric acid, which with other organic acids including ascorbic acid (vitamin C) give them their characteristic sharp taste. [29]
The orange juice must have a Brix reading of at least 9.7, excluding the sweetening ingredients, and contain between 0.5 and 1.8 percent of acid by weight calculated as anhydrous citric acid. [31] Added orange essences, orange oils and orange pulp adjusted in accordance with good manufacturing practice is permitted.
Strawberries. Burdeos likes these berries because they contain a high amount of nutrients like vitamin C, potassium, and antioxidants—for only 12 grams of carbs per one-cup serving.
The fermentate is diluted to produce a colorless solution of 5 to 8% acetic acid in water, with a pH of about 2.6. This is variously known as distilled spirit, "virgin" vinegar, [40] or white vinegar, and is used in cooking, baking, meat preservation, and pickling, as well as for medicinal, laboratory, and cleaning purposes. [37]
The only thing to be aware of is that—like all foods—certain fruits have more calories than others, and some have a lot more sugar. Remember, fruit is healthy and delicious . Keep enjoying it!