Comparative investigation of organic substances


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Organic compunds had been examined into a comparative research to identify the houses of each sample. The physical state in room temp, odor and color of the sample were noted by simply simple observation. In terms of solubility in H2O, 5% NaOH solution and 5% HCl solution, the samples were classified about miscible, somewhat immiscible or immiscible intended for liquid; and extremely soluble, soluble, partially soluble or insolubse for solid. The selections also underwent a test out using litmus paper to categorise its level of acidity, basicity or perhaps neutrality.

Another procedure was your ignition test, which classified the sample as to whether the sample was flammable, or perhaps nonflammable and the color of the flame were noted. After going through each of the tests, it absolutely was proven that organic ingredients possess different properties.


Organic compounds are the intricate compounds of carbon. Mainly because carbon atoms bond to each other easily, the foundation of most organic and natural compounds is comprised of carbon chains that vary in length and form.

Hydrogen, nitrogen, and oxygen atoms are the most popular atoms which can be generally placed on the carbon atoms. Each carbon atom has some as its valence number which increases the complexity of the compounds that are formed. Since co2 atoms have the ability to create double and three-way bonds to atoms, it further likewise raises the likelihood for variation in the molecular make-up of organic ingredients. [1] Carbon dioxide can also bond with itself and hydrogen to form both equally chains and rings referred to as hydrocarbons. Because the covalent connect between carbon dioxide and hydrogen is non-polar, these carbon dioxide skeletons will be hydrophobic. Useful groups may be added to carbon dioxide skeletons to generate them even more hydrophilic. Differences in the carbon skeleton and attached useful groups trigger organic molecules to have several chemical properties.

The substance properties of a molecule determine how it interacts with other substances and the function the molecule plays inside the cell. A lot of functional groups are hydrophobic and others will be hydrophilic. [2] Hydrocarbons are the simplestclass of organic ingredients and are made up solely of hydrogen and carbon. This class can be further divided into two groups: aliphatic hydrocarbons and aromatic hydrocarbons. Aliphatic hydrocarbons may be classified based upon the framework and binding of the carbon skeleton in to three organizations: alkanes, alkenes, and alkynes. Aromatic hydrocarbons or arenes, which contain a benzene engagement ring, were actually named for their pleasant smells. These chemical substances possess special properties due to the delocalized electron density in benzene, including additional leveling due to the system of conjugated wedding rings consisting of unsaturated bonds, lone pairs, and empty orbitals. [3] Organic and natural compounds have different properties. They might vary in their physical express at area temperature, color, odor and solubility in several reagents. The experiment should differentiate organic and natural compounds when it comes to: certain intrinsic physical houses, solubility in various solvents and behavior toward ignition. [4]


Chemical substances Tested





Benzoic Acid

Ethyl acetate

Ethyl amine

Determine 1 . Selections used in the experiment

Physical State, Color and Stench

The physical point out of the test was seen at area temperature. In that case, the color was noted and with a wafting motion, the odor was described.

Solubility Properties

The sample was presented in a expending dry check tube. 5 drops of eachsample was added if the sample is a liquid; and 0. you g of sample was added if the sample is actually a solid. The solid selections were grinded to increase the surface area. The solvent was added drop wise and counted the amount of drops of solvent included with a total of 3mL. Any kind of change, warming effects, soluble/insoluble, miscible/ immiscible or energy was known. Reaction with Litmus Daily news

If the water is soluble in water, the aqueous solution was tested with red and blue litmus paper. Colour changes in equally litmus conventional paper was noted. Ignition Test

Three to five drops with the liquid sample was put into a small evaporating dish and then was lighted with a match. If the test is solid, a crunch amount was used. The test was seen if it is flammable or certainly not. The color of flame produced was observed. Results and Discussions

A. Observation of Physical Point out at Space Temperature, Color and Odor of Examples

Table 1 ) Intrinsic homes of examples

As shown in the desk, most of the hydrocarbons are very clear. The result of the experiment confirmed that Phenol becomes reddish colored upon oxidation process and white-colored crystals for benzoic chemical p. The odours of the compounds are quite just like each other but nonetheless have different personality. Cyclohexane and DCM have paste-like stench. Ethanol has the aroma of alcohol while benzoic acid solution is unsmelling. Ethyl acetate has plastic-type material balloon scent while ethylamine has urine odor or can be ammoniacal odor due to its functional group, amine.

B. Test intended for Solubility Homes of Sample in WATER, 5% NaOH solution and 5% HCl solution

Stand 2 . Solubility of sample in different solvents

The solubility properties of organic ingredients using WATER, 5% NaOH solution and 5% HCL solution signifies whether the sturdy sample is usually soluble orinsoluble and if the liquid test is miscible and immiscible. Solubility of sample towards the solvent is related to polarity in the two chemicals and the intermolecular forces of attraction through the solution procedure. The “like dissolves like principle is involved. Normal water is a extremely solvent therefore the sample that is soluble or perhaps miscible with water is additionally polar. Based upon the effects, ethanol, phenol, ethyl acetate and ethylamine are polar compounds. The solubility in 5% NaOH solution of the water absurde sample can be an indication that acidic practical group exists. Compounds that behave as angles in aqueous solution happen to be detected by way of a solubility in 5% HCl solution. [5]

Ethanol and phenol will be miscible while benzoic acid is very sencillo in 5% NaOH solution. The rest of samples will be immiscible. Ethanol and ethylamine are miscible in five per cent HCl option while the remaining samples happen to be immiscible and benzoic acidity is insoluble. C. Effect with Litmus Paper

Table 3. Acid, basicity and neutrality of samples

Reaction with litmus daily news indicated level of acidity, basicity or perhaps neutrality of water-soluble selections. Acidic option turns blue litmus conventional paper to crimson and red litmus newspaper to crimson. Blue litmus paper to blue and red litmus paper to blue signifies a basic solution. Neutral solution is seen as a blue to blue litmus paper and red to red litmus paper.

Since shown in the table, phenol and ethyl acetate happen to be acidic although ethylamine is basic. Ethanol is a fairly neutral sample. Cyclohexane, DCM and benzoic acidity were not put through the litmus paper test because of their immiscible property with water. M. Ignition Test out

Table four. Degree of Luminosity of the Samples

The result of the Ignition evaluation indicates arsenic intoxication unsaturated or perhaps high carbon to hydrogen ratio. The degree of luminosity can be examined by the occurrence of yellow or lustrous flame. The aromatic compounds burn with sooty fire due to the unfinished combustion, which in turn causes the formation of an unburned carbon dioxide. The higher the number of Carbon atoms, the higher the

level of luminosity. Additionally , the higher the Carbon: Hydrogen Ratio, the greater the degree of luminosity. In terms of amount of luminosity: perfumed compound >unsaturated hydrocarbon >condensed hydrocarbon. [6] Complete combustion is mentioned by a blue flame ( non-luminous ) and there is more heat than light, the carbon is totally oxidized. 2C10H22 +31O2  20CO2 +22H2O

Incomplete combustable is suggested by a yellow-colored flame (luminous) and there is much light than heat; the carbon is usually not totally oxidized. 2C2H2 + 5O2  4CO2 + 2H2O + heat

Based upon the stand, cyclohexane, phenol, ethyl acetate and ethylamine are burnable with lustrous flame although ethanol with nonluminous fire. DCM and benzoic acid are both non-flammable


[1] retrieved upon September a couple of, 2013 coming from http://www.wisegeek.com/what-are-organic-compounds.htm [2] retrieved about September 2, 2013 coming from http://highered.mcgraw-hill.com/sites/dl/free/0035456775/694192/bioTP_CH3_mgb_final_OK.pdf [3] retrieved about September two, 2013 via https://www.boundless.com/chemistry/atoms-molecules-and-ions/organic-compounds”2/introduction-to-hydrocarbons/ [4] Bayquen, A., Cruz, C., de Guia, R., Lampa, F., Peña, G., Sarile, A., & Torres, P. (2009). Clinical Manual in Organic Biochemistry. Quezon Town: C&E Publishing, Inc..

[5] Retrieved upon September a couple of, 2013 via http://www.uobabylon.edu.iq/eprints/publication_10_5343_904.pdf

[6] Shriner, L., Hermann, C. K. N., Morrill, Curtin, D. Con. (1998) The Systematic Id of Organic Compounds. seventh ed. New York: John Wiley & Daughters, Inc.


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