amount of citric acid. The procedure commonly used to do this takes advantage of the known reactivity of citric acid with sodium hydroxide and is known as a titration. A titration is a means of quantitative analysis in which the substance to be measured (in a liquid solution) is reacted stoichiometrically with another reagent. Citric acid is a weak acid, and is thus best titrated using a strong base, such as sodium hydroxide, with the combination of a weak acid and a strong base producing an endpoint that corresponds to the range of phenolphthalein indicator (pH range of 8.3-10).
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SOLVED Question 16 Look at the structure for citric acid (see Figure below) Various sodas
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Prepare mL of distilled water in a suitable container. Add g of Citric Acid to the solution. Add g of Sodium Hydroxide to the solution. Add g of Hydrochloric Acid to the solution. Adjust solution to final desired pH using HCl or NaOH. Add distilled water until volume is L. Citrate-Sodium Citrate Buffer Calculator.. The third titration, C, has citric acid monohydrate as an unknown carboxylic acid to be determined by titration. A. Standardization of a sodium hydroxide solution. Citric acid can be used as a lower-cost alternative reagent to potassium hydrogen phthalate 1 (KHP) for standardizing 0.1 M NaOH solutions. High-purity solid citric acid costs about
