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Q how to tell if a pigment is polar
MaxwellDaniell
RivaAlerander Release Time: April 23, 2024, 6:43 AM
To determine if a pigment is polar, consider its chemical structure and solubility. Polar molecules typically contain polar bonds where electrons are not shared equally, often due to the presence of electronegative atoms like O, N, or F, and may contain functional groups such as -OH, -COOH. A practical test is to assess the pigment’s solubility: polar pigments will dissolve in polar solvents like water or ethanol, whereas nonpolar pigments are likely to dissolve in nonpolar solvents such as hexane or benzene. Additionally, thin layer chromatography (TLC) can be used; polar pigments will travel less on a polar stationary phase compared to nonpolar pigments due to stronger interactions with the stationary phase.
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