Interpretation:
To identify the elution order of given
Concept Introduction:
London dispersion force also called an induced dipole-induced dipole attraction is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles.
Dipole-dipole interaction results when two dipolar molecules interact with each other through space, there occurs a partially negative charge of one of the polar molecules is attracted to the partially positive charge of the second polar molecule.
Ion-dipole interaction results of an electrostatic interaction between a charged ion and a molecule that has a dipole.
A hydrogen bonding is partially an electrostatic attraction between
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Chemistry & Chemical Reactivity
- A student performed chromatography on a mixture of benzoic acid (C6H5CO₂H), acetophenone (C6H5C(O)CH3) and styrene (C6H5CHCH₂). She used alumina (Al₂O3) as the stationary phase and a 9 : 1 mixture of hexane : ethyl ethanoate as the mobile phase. Rank the order in which the compounds moved, from fastest to slowest. benzoic acid acetophenone styrenearrow_forwardThe height of three peaks; A, B, and C obtained in a gas chromatogram are 20.6 mm, 17.5 mm and 40.6 mm. The width of the peaks, at half height, are 4.4 mm, 4.0 mm and 3.9 mm, respectively. Calculate the percentage composition of A in the sample.arrow_forward2. What is the basis for the separation of components of mixtures by paperchromatography?arrow_forward
- One method for the quantitative determination of the concentration of constituents in a sample analyzed by gas chromatography is area normalization. Here, complete elution of all the sample constituents is necessary. The area of each peak is then measured and corrected for differences in detector response to the different eluates. This correction involves dividing the area by an empirically determined correction factor. The concentration of the analyte is found from the ratio of its corrected area to the total corrected area of all peaks. For a chromatogram containing three peaks, the relative areas were found to be 16.4, 45.2 and 30.2, in order of increasing retention time. Calculate the percentage of each compound if the relative detector responses were 0.60, 0.78 and 0.88, respectively.arrow_forwardPAPER CROMATOGRAPHY • Define chromatography • Demonstrate an understanding of the process of chromatography • Describe the steps involved in a chromatography investigation Explanation Coloured inks are often made up of several different inks. Each colour of ink will get carried a different distance by the water, allowing you to see all of the different inks. Try this with different colours to see what actually goes into a colour. This technique is called chromatography and can be used in chemistry to find out what is in an unknown mixture. II. Materials .Felt tip pens (non-washable) . Kitchen roll .A bowl or cup . Water • Scissors III. Health and safety • Make sure that you thoroughly clean any equipment after the experiment before using for food IV. Procedure Method 1 1. Take a sheet of kitchen roll and draw a simple picture with a non-washable felt tip pen. 2. Place the sheet over an empty bowl. This is to keep the paper from getting too wet. 3. Carefully add a few drops of water…arrow_forwardYou are carrying out an experiment by analysing alcoholic drinks by gas chromatography. Why is Gas chromatography the best technique used for this analysis? Why is Carbowax a suitable stationary phase for this analysis? What gases are used and what is their purpose and source?arrow_forward
- Gas Chromatography can have which of the following stationery phases and/or mobile phases: A mixture hydrogen and oxygen as a mobile phase O a thin film on a solid support within the column as the stationery phase O a carrier gas as a stationery phase O a mixture of hexane and acetone as the mobile phasearrow_forwardDescribe chromatography analysis, the two essential phases used in paper chromatography and provide an example.arrow_forwardGas chromatography cannot analyze mixtures due to the sensitivity of the instrument. True Falsearrow_forward
- In chromatography, the compound that is least soluble in the mobile phase a) Travels the furthest away from the line of origin b) Stays closest to the line of originarrow_forwardCan paper chromatography be used to separate and identify very volatile substances? How do I prove this.arrow_forwardGiven below is a diagram of separation of two components of a mixture in a reverse phase chromatographic column. From the diagram, which component is the most non-polar?arrow_forward
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