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Paper chromotagraphy is a technique of separating a solution containing two or more soluble solids. A minute amount of the solution is first dotted on a piece on paper. The paper is then hung above a solvent (such as water or ethanol) just so that the tip of the paper is soaked in the solvent.

The solvent then rises upwards and soaks the rest of the paper. This occurs because there is a force of attraction between the solvent and the paper.

As the solvent rises, it carries the sample of the initial solution and separates the dissolved solids. The multiple different solids settle at different points on the paper, based on its solubility.

The point at which the solvent stops rising upwards is known as the solvent front.

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12y ago

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