In thin layer chromatography, would a more polar solvent increase or decrease the Rf values. Explain...
In thin layer chromatography, would a more polar solvent increase or decrease the Rf values. Explain your answer by referring to TLC theory (stationary phase, moving phase, polarity...)
Homework Answers
Usually, the stationary phase is more polar compared to mobile phase.
If the polarity of mobile phase increases, then the eluting power of the solvent also decreases. This will take the sample to lesser distance and thus Rf value will be low.
If the mobile phase is non polar, then the solvent travels to greater extent and thus Rf value will be high.
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In thin layer chromatography, would a more polar solvent increase or decrease the Rf values. Explain...
In Thin Layer Chromatography Experiments, would a more polar compound give a smaller or larger Rf...
In Thin Layer Chromatography Experiments, would a more polar compound give a smaller or larger Rf value then a less polar compound? Explain your answer by referring to TLC theory (stationary phase, moving phase, polarity). Thanks!
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Problem 1 Thin layer Chromatography consist of three parts: The analyte, the stationary phase and mobile phase. Match each of these terms to what is was in out experiment. Stationary Phase ____ a) The solvent Mobile Phase ____ b) Silica Analyte ____ c) One of the analgesiscs Problem 2 Complete the sentences Analytes on a TLC should have a(n) _________ Rf in a less polar solvent. Analytes on a TLC should have a(n) _________ Rf in a more polar solvent....
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1) Using a thin layer chromatography plate you experimentally determine the Rf values of benzhydrol and...
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1) Calculate the Rf value of a spot that travels 5.7 cm, with a solvent front...
1) Calculate the Rf value of a spot that travels 5.7 cm, with a solvent front that travels 13 cm. 2) A student spots an unknown sample on a TLC plate and develops it in pentane solvent. Only one spot, for which the Rf value is 0.05, is observed. Is the unknown material a pure compound? What can be done to verify the purity of the sample using thin-layer chromatography? 3) You try to synthesize n-hexyl bromide as a product...
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1) Calculate the Rf value of a spot that travels 5.7 cm, with a solvent front that travels 13 cm. 2) A student spots an unknown sample on a TLC plate and develops it in pentane solvent. Only one spot, for which the Rf value is 0.05, is observed. Is the unknown material a pure compound? What can be done to verify the purity of the sample using thin-layer chromatography? 3) You try to synthesize n-hexyl bromide as a product...
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Past paper question R, values for photosynthetic pigments may be determined using the technique of thin-layer chromatography (TLC). TLC plate Origin Solvent a. Outline what happens when spinach extract is spotted on a TLC plate and placed into a container of solvent. [2 marks] b. Explain what the Rf values represent in chromatography. [3 marks) c. State two photosynthetic pigments that could be identified using chromatography. [1 mark]
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