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Hello.
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So in this question, we need to discuss about the chromatography that how using the paper chromatography and it allows the identification of metal ketion.
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So you can see here that some this is how the paper chromatography has done.
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So we can find out this identification.
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That means if we have to identify the metal cation.
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So we have two ways to find out that.
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First is your by comparing the rf values.
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Next is by comparing the color, right? that developed spots display on spraying with a specific reagent.
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So the paper, it is prepared by the spotting different standard metal ion solution.
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Say for example, if we have five different metal iron.
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Suppose we have five different metals are there.
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So using a capillary tube along with the solution containing all the five standard solution here, then the unknown is spotted on that paper.
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If we have the five different metal ions here and if we have the solution here and using that capillary tube when we are doing this paper chromatography, then unknown for the unknown solution or unknown metal ion, that color will be displayed here.
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Then the unknown is spotted onto the paper.
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The paper it is developed by placing it on into the, we can say the developing element is there.
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The paper that after we can say that 75 to 90 minutes or 70 to 90 minutes of development, it is visualized by wetting it with aqueous solution of potassium iodide...