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Okay phenol, carboxylic acids and cyclohexanol are all weak acids by definition. Phenol can lose ion easily because phenoxide ion formed is stabilized to some extent. Why is Phenol a Phenol, once known as carbolic acid, HC 6 H 5 O, is a weak acid. Its K a is 1.1 × 10 − 10 .A solution of phenol is prepared by dissolving 14.5 g of phenol in enough water to make 892 mL of solution. 2. Homogeneous mixtures of phenol and water at phenol to water mass ratios of ~2.6 and higher are possible. Both alcohols and phenol are weak acid, the alcohols are less acidic than phenol because it is very tough to remove ′ H ′ ion from alcohol. 1) Phenol is a weak acid. (Assume that ionic compounds are soluble and neutral organic compounds are not soluble.) Use pKa’s and equations and sentences to support your answer. The organic acids are weak in the sense that this ionisation is very incomplete. The O-H bonds is weaker and therefore breaks more easily in comparison to ethanol. It was one of the first antiseptics used by Lister. Will phenol dissolve in a NaHCO3 solution? Phenol is a weak acid because the position of the equilibrium lies well to the left and phenol can also lose a hydrogen ion and the phenoxide ion formed is stabilized to some extent. Phenol is a weak acid. Its conjugate base is obviously more soluble in water because it is an ionic compound. At any one time, most of the acid will be present in the solution as un-ionised molecules. There are some organic ones, but the ones you should know are HCl, HBr, HI, HNO3, H2SO4, HClO4. a) Will phenol dissolve in an aqueous NaHCO, solution? The negative charge on the oxygen atom is delocalized around the ring and it makes phenol a weaker acid. Phenol (PhOH) is a weak acid. For example, in the case of dilute ethanoic acid, the solution contains about 99% of ethanoic acid molecules - at any instant, only about 1% have actually ionised. This is as the negative charge on the oxygen atom is delocalized around the ring. Acidity. Phenol is an organic compound appreciably soluble in water, with about 84.2 g dissolving in 1000 mL (0.895 M). Phenol and Alcohol with Alkali (NaOH) The lone pair of electrons on oxygen delocalises into the benzene ring (mesomeric effect) which reduces the electron density in the O-H bond. Use pKa's and equations and sentences to support your answer. The sodium salt of phenol, sodium phenoxide, is far more water-soluble. Strong acids are those that fully dissociate in aqueous solution. Phenolphthalein is a chemical compound with the formula C 20 H 14 O 4 and is often written as "HIn" or "phph" in shorthand notation.Phenolphthalein is often used as an indicator in acid–base titrations.For this application, it turns colorless in acidic solutions and pink in basic solutions. a. Its conjugate base is obviously more soluble in water because it is an ionic compound. 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