• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Chemical properties of Ethanol & Phenol

Extracts from this document...


Chemical properties of Ethanol & Phenol Objective To find out the chemical properties and pH of ethanol and phenol, and compare their differences between ethanol and phenol. Results Reaction of ethanol: Properties / Reactions Observations / Smell Corresponding equations (if any) pH of solution universal indicator remains green, pH=7 / Triiodomethane reaction yellow precipitate found at bottom of test-tube, with odour smell C2H5OH + 4I2 + 6NaOH � CHI3(s) + HCOO-Na+ + 5NaI + 5H2O Reaction with Na Na sinks to bottom, colourless gas, which gives a 'pop' sound to burning splint, evolves slowly and moderately. When ethanol-ethoxide mixture in test-tube is poured onto a petri-dish, small, colourless rectangular-shaped crystals are formed in a few minutes. 2C2H5OH + 2Na � 2C2H5O-Na+ + H2(g) Esterification When the mixture of ethanol, ethanoic acid & conc.H2SO4 in test-tube is poured into Na2CO3 solution, a smell like all-purpose adhesive is noticeable. Reaction of phenol: Properties / Reactions Observations / Smell Corresponding equations (if any) Solubility in water: (a) a little phenol (b) ...read more.


2.> Ensure that all sodium is reacted in test-tube before disposing the liquid. 3.> Avoid adding too large sodium to ethanol or phenol since the reaction may be to vigorous. 4.> Avoid contact with the crystal of phenol. If you contact with it accidentally, wash your hands with glycerol or plenty of water, or your hands may have white strain due to phenol's corrosive property. Discussion 1.> The smell of phenol is close to that in hospital. 2.> Both pH test (acidic in phenol, neutral in ethanol), iodoform test (+ve in ethanol), solubility test (miscible between ethanol & water), reaction with NaHCO3 (phenol is insoluble), reaction with Br2 water (phenol decolourize Br2) and reaction with neutral FeCl3 (Fe3+ and phenol forms a violet complex) can distinguish between ethanol & phenol. 3.> Phenol is much more soluble in NaOH than in water because the reaction between phenol and water to form H3O+ & phenoxide is reversible (since phenol is a weak acid, most H+ formed will combine with phenoxide to form phenol again) ...read more.


On the other hand, ethanol is saturated and has no electron-rich centre, thus no reaction between ethanol and Br2. 7.> Some of the reactions in this experiment is useful and is usually used for daily life. For example, (a) Iodoform reaction is used to prepare a compound that is one carbon less than previous one and iodoform itself can be used as pesticide. (b) Phenol and it's derivatives can be used as antiseptics so it's quite common to smell their smell in hospital. (c) Esterification can be used to synthesize esters in perfumes. (d) Phenol can be purified by adding NaOH to phenol and organic compound mixtures, sodium phenoxide can then be crystallized and separated, phenol is regenerated by adding H+. (e) FeCl3, Br2 and NaOH are used to test the presence of phenol if all these three tests show positive result. Conclusion Both ethanol and phenol are widely used compounds, especially in disinfectant. To distinguish them, several tests are needed, since other compounds may also be positive on these tests. If all of these test shows positive result, then the uncertain organic compound may be either one of them. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Organic Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Organic Chemistry essays

  1. Preparation of haloalkane. The purpose of this experiment is to prepare 2-chloro-2-methylpropane from ...

    At room temperature, HCl is a colorless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric humidity. These fumes are highly acidic and should be avoided breathing in or contacting. This is why the transfer of concentrated HCl is suggested to be done in the fume cupboard.

  2. Investigation of Some of the Properties of a Pair of Cis-Trans Isomers

    The fumaric acid is formed by adding hydrochloric acid and maleic acid together and being heated. The hydrogen chloride adds to the maleic acid, forming an intermediate in which there is unrestricted rotation about the C-C bond. As the fumaric acid is less soluble than water, the acid precipitates during the heating process.

  1. The aim of this experiment is to produce Aspirin. This is an estrification in ...

    * Sodium hydroxide solution 0.1 mol dm-3 * Burette * Phenolphthalein indicator * Analytical balance (4 d.p) * Burette * Burette Stand * Volumetric flask 500 cm3 * Distilled Water * Funnel * White Tile * Goggles * Laboratory coat Apparatus Justification * Aspirin - contains the acetylsalicylic acid, which

  2. investigating the amount of ascorbic acid present in fruit

    Lime: The number of moles of the NBS solution used in the lime sample was 2.80 x 10-3 moles so therefore the sample of lime has 2.80 x 10-3 moles of vitamin C in it. Lemon: The number of moles of the NBS solution used in the lime sample was

  1. Comprehensive and Detailed Chemistry notes

    and to achieve stability thay can capture an electron and convert a proton into a neutron E.g: 74Be + 0-1e � 73Li GAMMA EMISSION: o Gamma emissions () accompany many nuclear decay reactions o Gamma rays are high energy electromagnetic rays o Gamma rays shed energy as nuclear particles rearrange

  2. Oxidation of Ethanol

    This proves that the reaction was exothermic. * After all of the sodium dichromate was added to the sulphuric acid I noticed that the bubbling ceased as the reaction inevitably stopped. Boiling under Reflux * After I had made the ethanol I closed the tap on the dropping funnel so


    Seek medical attention as soon as possible. If inhaled, remove victim and put where there's fresh air. If chemical gets into eyes, wash off with plenty of water and seek medical help. Wear eye protection and gloves during handling. Cleapss card number 91 Ammonia Corrosive: causes burn.

  2. Qualitative Analysis (A combined approach using spectroscopic and chemical analysis for structural identification of ...

    The tube was plunged into a mortar containing 10ml of distilled water and was covered with clean wire gauze. The shattered glass was grinded up and the mixture was filtered through a filter paper to a boiling tube. Detection of nitrogen (Procedure A)

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work