posted by .

what two tests can I use to determine if a comound is an alcohol or a short or long chained carboxylic acid. I have two substances a colourless liquid and a white solid.

  • chemistry -

    I would try an aqueous solution with litmus paper. Alcohols are neutral and carboxylic acids are acidic. Second test is to add NaHCO3. Carboxylic acids evolve CO2 gas.

  • chemistry -

    Comparing the boiling points could also be an option.

    Carboxylic acid has a larger boiling point than alcohol.

    Short chained carboxylic acid tend to have a lower boiling point than long chained carboxylic acid (more number of carbons).

  • chemistry -

    I am not sure if you are looking for physical or chemical tests. Also is the expected alcohol primary, secondary or tertiary?

    From experience the appearance of simple carboxylic acids are glassy solids, whereas alcohols are waxy solids. The latter tend to 'set' rather than crystalise.

    Solubility in an alkaline solution would also be useful. Dissolve a small amount of each in a solvent and extract with 0.1 M NaOH. Separate the phases. Add 0.1 M HCl until the aqueous phase is acid. If the aqueous phase goes cloudy, then the sample was the acid. The alcohol sample might result in a slight haze with the HCl, but the acid sample should go very cloudy.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. organic chemistry

    which alcohol and carboxylic acid would produce benzyl isobutyrate by Fischer esterification?
  2. Chemistry

    If a colourless liquid with a pungent odour is added slowly to another colourless liquid, a dark brown precipitate is produced that later dissolves to produce a colourless solution. What are the two colourless liquids?
  3. Chemistry

    1. Why is benzoic acid more soluble in water than in octane?
  4. Chemistry

    Consider the densities of the liquid substances listed. a) How will substance X, a solid, with density of 0.87 g/cm^3, behave when placed in each of the other pure liquids?
  5. Chemistry

    Where two liquid substances are mixed together and a solid forms by a chemical reaction, the solid is known as what?
  6. science 2

    6. When aqueous solutions of table salt and silver nitrate are mixed, a white solid forms. This solid is ____. (1 point)soluble a precipitate an alloy a solute 7. Stainless steel is an example of a ____ solution. (1 point)liquid-solid …
  7. chemistry

    Water (H20) is a liquid at room temperature and atmospheric pressure whereas hydrogen sulfide (H2S) is a gas under the same conditions. Based on this information, what can you say about the intermolecular interactions in these two …
  8. Science

    7. Which of the following changes gives no evidence that a chemical reaction has taken place?
  9. Chemistry

    a .6800g sample of carboxylic acid is burned in oxygen, producing 1.212 g of CO2 and .4991 g of H2O. determine the empirical formula of the carboxylic acid
  10. chemistry

    How much volume of a 1.5 M KOH is needed to extract a carboxylic acid from a mixture of 2.450 gram of benzoic acid and a 2.080 g of acetanilide?

More Similar Questions