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Paper Chromatography Technique Overview

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Questions and Answers

What is the purpose of using chromatography paper in paper chromatography?

To separate substances based on solubilities

To act as the stationary phase (correct)

To act as the mobile phase

To dissolve the ink

Why is it important to draw the starting line in pencil in paper chromatography?

To help the ink move up the paper faster

To increase the solubility of compounds

To reduce the separation of substances

To prevent ink from dissolving in the solvent (correct)

What happens if a pure compound is tested using paper chromatography?

It produces multiple spots in all solvents

It doesn't produce any spots

It produces different spots in different solvents

It produces a single spot in all solvents (correct)

Why do more soluble substances travel further in paper chromatography?

<p>Because they interact more with the solvent (C)</p> Signup and view all the answers

How do compounds in a mixture behave in paper chromatography?

<p>They may separate into different spots depending on the solvent used (A)</p> Signup and view all the answers

Study Notes

Paper chromatography is a physical separation technique used by scientists to separate substances in a mixture based on their different solubilities.
The process involves using chromatography paper as the stationary phase and a solvent as the mobile phase, with the solvent carrying the dissolved ink up the paper.
A key point to note is that a pure compound will produce a single spot in all solvents, while compounds in a mixture may separate into different spots depending on the solvent used.
Paper chromatography works because different substances have different solubilities, with more soluble substances traveling further than less soluble ones in the solvent.
Drawing the starting line in pencil is essential to prevent the ink from dissolving in the solvent and moving up the paper, demonstrating the importance of using a pencil line.

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Description

Learn about paper chromatography, a physical separation technique used to separate substances in a mixture based on their different solubilities. Discover how it works, the role of chromatography paper and solvent, as well as how pure compounds produce a single spot while mixtures can separate into different spots.