Need help completing exam questions on chromatography

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ellen.w
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4.1) the green ink contains more than two compounds. Suggest one reason why only 2 spots are seen?
4.2) two ways to increase the distance between spots
4.3) why does the manufacturer of the green ink use the same proportions of yellow and blue dye
Thanks !!
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scimus63
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4.1- perhaps some of the substances are insoluble in the chosen solvent so will not rise up the paper.
4.2- use a different solvent, perhaps the differences in solubility will affect how far the dots travel
4.3- could it be to get consistency in colour?

try looking here
https://www.science-revision.co.uk/chromatography.html
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ellen.w
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(Original post by scimus63)
4.1- perhaps some of the substances are insoluble in the chosen solvent so will not rise up the paper.
4.2- use a different solvent, perhaps the differences in solubility will affect how far the dots travel
4.3- could it be to get consistency in colour?

try looking here
https://www.science-revision.co.uk/chromatography.html
Thank you so much
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