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Learn how chromatography can analyze and separate substances dissolved in mixtures, used in forensic science to monitor purity. Discover how different solutes with varying solubilities can be separated through chromatography processes. Conduct experiments to test various inks and dyes, like smarties and felt tips, to observe chromatograms revealing unique substance patterns. Uncover a murder mystery at Canon Manor by using chromatography techniques to match the pen ink from different suspects to the evidence left at the crime scene. Complete a forensic science homework sheet on the role of a forensic scientist before the next science class!
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Chromatography What I’m looking for is how chromatography can identify and separate substances in mixtures? Keywords: analyse, chromatogram, chromatography, dissolved, forensic science, monitor, purity
Chromatography Two or more solutes that are soluble in a certain solvent can be separated. Different substances have different solubilities so one substance will be more soluble in a solvent than another. As the solvent washes through the paper, it carries the ink with it. The solutes in the inks that are the most soluble will be carried further up the paper. The less soluble solutes will not travel as far and the colour will come out well down the paper.
Do different colours contain the same dyes? • Test different smarties and felt tips to see if they contain the same dyes. • Place a spot of ink at the bottom of the piece of paper. • Allow the solvent to travel through the paper from the bottom of the beaker. • Make a cartoon of your experiment.
Lady Maguire:Pen A Joseph: Pen B The Butler: Pen C
Lady Joseph The Murderer’s Maguire Butler Note
Lady Joseph The Murderer’s Maguire Butler Note
Homework • Sheet about the job of a forensic scientist. • Due Next Science Class!!!