why does salicylic acid give a positive test with FeCl3
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This is a commonly used test to detect the presence of phenolic hydroxyl groups in organic compounds. The reaction between salicylic acid and FeCl3 forms a complex with a purple color, indicating the presence of phenolic groups in the compound.
No, salicylic acid is not an alcohol. It is a type of acid known as a beta hydroxy acid.
If salicylic acid is tested with FeCl3, a violet color will be observed indicative of the presence of phenols in the compound. This test is commonly used to identify the presence of phenolic functional groups in organic compounds.
Yes, FeCl3 is an acidic salt because it is a salt composed of a positive iron ion (Fe3+) and three negative chloride ions (Cl-), with the ability to react with water to form hydrochloric acid.
The amount of FeCl3 needed depends on the concentration of the FeCl3 solution required for the test. Typically, a 2-5% solution of FeCl3 is used. To make a 100mL of 2-5% FeCl3 solution, you would need to dissolve 2-5 grams of FeCl3 in distilled water. The exact amount can be calculated using the formula: (desired % concentration/100) x volume of solution needed x molar mass of FeCl3.
The balanced equation for the reaction between salicylic acid and sodium hydroxide is: C7H6O3 + NaOH → C7H5NaO3 + H2O